Non-current assets Derivative Asset, Noncurrent Goodwill resulting from business combinations Goodwill, Acquired During Period Statistical Measurement [Domain] Statistical Measurement [Domain] Total capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Contract assets Contract Assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Other Debt Instrument, Increase (Decrease), Other, Net Cover page. Cover [Abstract] Weighted-Average Grant-Date Fair Value Per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Net change in cash and equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Utilization — cash Restructuring and Integration Reserves, Settled with Cash Restructuring and Integration Reserves, Settled with Cash Realized loss on fair value adjustment Equity Securities, FV-NI, Realized Loss Foreign Plan Foreign Plan [Member] Schedule of Indefinite-Lived Intangible Assets [Table] Intangible Asset, Indefinite-Lived [Table] Corporate Expense Corporate Expense [Member] Corporate Expense Trading Symbol Trading Symbol All Trading Arrangements All Trading Arrangements [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Long-term debt Long-Term Debt and Lease Obligation Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Non-NEOs Non-NEOs [Member] Related tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Award vesting period Vesting period (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative Financial Instruments Derivative [Line Items] ASSETS Disposal Group, Including Discontinued Operation, Assets [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Other Other Foreign Countries [Member] Represents other foreign countries member. SHAREHOLDERS' EQUITY AND STOCK-BASED COMPENSATION Liabilities of DBT and Heat Transfer (Note 3) Liabilities of Abandoned Entities Liabilities of Abandoned Entities Disposal Group Name [Domain] Disposal Group Name [Domain] Pay vs Performance Disclosure [Line Items] Line of Credit Facility [Table] Line of Credit Facility [Table] Retention Agreements Retention Agreements [Member] Retention Agreements Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Derivative [Table] Derivative [Table] (Gain) loss on change in fair value of equity security Equity Securities, FV-NI, Gain (Loss) Unrealized gain recorded in AOCI AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Inventories, net Inventory, Policy [Policy Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Debt Debt [Roll Forward] FAIR VALUE Fair Value Disclosures [Text Block] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Award Timing Disclosures [Line Items] Contribution related to employee retention agreements for acquisition (Refer to Note 3) Increase (Decrease) Prepaid Compensation Related To Acquisition Increase (Decrease) Prepaid Compensation Related To Acquisition Goodwill related to foreign currency translation Goodwill, Related to Foreign Currency Translation and Other Represents the adjustments, during the period, to the net value of goodwill related to for foreign currency translation and other adjustments. Long-term incentive compensation expense APIC, Share-based Payment Arrangement, Long Term Incentive Compensation Expense APIC, Share-based Payment Arrangement, Long Term Incentive Compensation Expense Other Performance Measure, Amount Other Performance Measure, Amount Estimated annual amortization expense, year three Finite-Lived Intangible Asset, Expected Amortization, Year Three Other indebtedness Other Borrowings [Member] Represents other borrowings which are not otherwise provided in the taxonomy. Schedule of changes in the carrying amount of goodwill, by reportable segment and other operating segments Goodwill [Line Items] Basic (in dollars per share) Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Basic LEASES Lessee, Operating Leases [Text Block] Common stock outstanding (in shares) Common Stock, Shares, Outstanding Purchase card programs Short-Term Bank Loans and Notes Payable Large power projects Large Power Projects [Member] Large Power Projects [Member] Revenue from Contract with Customer [Abstract] Long-lived assets of discontinued operations, DBT and Heat Transfer Long-lived Assets of Discontinued Operations Long-lived Assets of Discontinued Operations Contract liabilities Contract Liabilities - current Contract with Customer, Liability, Current UNITED STATES UNITED STATES Term loan Loans Payable [Member] Service cost Defined Benefit Plan, Service Cost Cash and equivalents Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Other assets Other Assets, Noncurrent Entity Tax Identification Number Entity Tax Identification Number Leases [Abstract] Leases [Abstract] Gross Carrying Value Finite-Lived Intangible Assets, Gross Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Operating Segments Operating Segments [Member] Net cash from (used in) operating activities Net Cash Provided by (Used in) Operating Activities Patents Patents [Member] Cash flows from (used in) operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Common Stock In Treasury Treasury Stock, Common [Member] Schedule of Changes in Components of Accumulated Other Comprehensive Income, Net of Tax, Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Contract liabilities Disposal Group, Including Discontinued Operation, Contract Liabilities, Current Disposal Group, Including Discontinued Operation, Contract Liabilities, Current Equity Components [Axis] Equity Components [Axis] Borrowings under senior credit facilities Borrowings under Senior Credit Facilities The cash inflow from the senior credit facilities during the period. Other current assets Other Assets, Current Award Timing Method Award Timing Method [Text Block] Net periodic pension benefit expense Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net income Business Acquisition, Pro Forma Net Income (Loss) Black-Scholes Option-Pricing Model [Line Items] Black-Scholes Option-Pricing Model [Line Items] Black-Scholes Option-Pricing Model Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net cash from (used in) discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Insider Trading Policies and Procedures [Line Items] Use of Estimates Use of Estimates, Policy [Policy Text Block] Income from continuing operations per share of common stock: Business Acquisition, Pro Forma Income (Loss) from Continuing Operations [Abstract] Business Acquisition, Pro Forma Income (Loss) from Continuing Operations Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Net cash from (used in) discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Adjustment to Compensation, Amount Adjustment to Compensation Amount Paid-in capital Additional Paid in Capital, Common Stock Compensation Amount Outstanding Recovery Compensation Amount Diluted income per share of common stock: Earnings Per Share, Diluted [Abstract] Restricted stock shares/units Restricted Stock And Restricted Stock Units [Member] Restricted stock and restricted stock units as awarded by a company to their employees as a form of incentive compensation. Disposal Group Classification [Axis] Disposal Group Classification [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Loss on disposition of discontinued operations, net of tax Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Entity Small Business Entity Small Business Technology Developed Technology Rights [Member] Company Selected Measure Amount Company Selected Measure Amount Geographical [Axis] Geographical [Axis] Acquisitions, Dispositions and Discontinued Operations [Abstract] Acquisitions, Dispositions and Discontinued Operations ASPEQ Heating Group ASPEQ Heating Group [Member] ASPEQ Heating Group Tabular List, Table Tabular List [Table Text Block] Increase (decrease) in contract with customer, asset, net, current Increase (Decrease) in Contract with Customer, Asset, Net, Current Increase (Decrease) in Contract with Customer, Asset, Net, Current Stock-based Compensation Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Finite-lived intangible assets acquired Finite-Lived Intangible Assets Acquired Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Carrying values of accruals Loss Contingency Accrual Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Accrued expenses Accrued Liabilities, Current Number of options or units that were excluded from the computation of diluted income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Ingénia Technologies Inc. Ingénia Technologies Inc. [Member] Ingénia Technologies Inc. Cash spending on restructuring actions Payments for Restructuring Life insurance, corporate or bank owned, amount Life Insurance, Corporate or Bank Owned, Amount Credit Facility [Domain] Credit Facility [Domain] Weighted-average interest rate of senior credit facilities Debt, Weighted Average Interest Rate Increase (decrease) in contract with customer, liability, current Increase (Decrease) in Contract with Customer, Liability, Current Increase (Decrease) in Contract with Customer, Liability, Current Security at fair value Equity Securities, FV-NI, Current Detection and Measurement reportable segment Detection and Measurement [Member] Detection and Measurement Current assets: Assets, Current [Abstract] Goodwill Goodwill, balance at the beginning of the period Goodwill, balance at the end of the period Goodwill Consolidation Items [Axis] Consolidation Items [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Capital expenditures: Payments to Acquire Productive Assets [Abstract] Shares repurchase, amount Share Repurchase Program, Authorized, Amount INVENTORIES, NET Inventory Disclosure [Text Block] Income from continuing operations Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Usage Standard and Extended Product Warranty Accrual, Decrease for Payments Treasury stock (in shares) Treasury Stock, Common, Shares Gross accrued interest Unrecognized Tax Benefits, Interest on Income Taxes Accrued Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Product and Service [Domain] Product and Service [Domain] Stock Options Share-Based Payment Arrangement, Option [Member] FX Forward Contracts Foreign Exchange Forward [Member] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Changes in the carrying amount of goodwill Goodwill [Roll Forward] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Derivative fair value Derivative, Fair Value, Net Net borrowings (repayments) under other financing arrangements Proceeds from (Payments for) Other Financing Activities Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Pension Plan Pension Plan [Member] Income taxes payable Accrued Income Taxes, Current Correlation Between Total Shareholder Return for SPX and the Applicable S&P Index Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions, Total Shareholder Return Correlation Represents the assumed correlation between the total shareholder return for the entities stock and the S&P 500 Composite Index and the S&P Composite 1500 Industrials Index. Currency translation adjustment and other Restructuring and Integration Reserves, Translation and Other Adjustment The amount of change in the restructuring and integration reserves related to foreign currency translation adjustments and any other adjustments not separately disclosed or provided for elsewhere in the Taxonomy. Balance at beginning of year Balance at end of period Restructuring and Integration Reserves Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Also includes integration reserves. Security Exchange Name Security Exchange Name Award Type [Axis] Award Type [Axis] Basic income per share of common stock: Earnings Per Share, Basic [Abstract] Amount Reclassified from AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Segment Reporting Segment Reporting [Member] Segment Reporting LIABILITIES Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Unvested PSU’s and RSU’s Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Work in process Inventory, Work in Process, Net of Reserves South Africa SOUTH AFRICA Repayments Repayments of Debt Number of third-party disposal sites for which entity is potentially responsible Site Contingency, Number of Sites on which Entity Potentially Responsible Represents the number of offsite, third-party disposal sites for which the entity is potentially responsible and have received notices of potential liability pursuant to various environmental laws. Total tangible long-lived assets Long-Lived Assets Performance Stock Units and Restricted Stock Units Performance Shares, Restricted Stock, and Restricted Stock Units [Member] Performance Shares, Restricted Stock, and Restricted Stock Units [Member] Short-term debt Less: short-term debt Short-Term Debt Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revolving Credit Facility Revolving Credit Facility [Member] Expiration Date Trading Arrangement Expiration Date Cash flows from (used in) investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Net cash from (used in) continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Mature Within One Year Mature Within One Year [Member] Mature Within One Year Total Shareholder Return Amount Total Shareholder Return Amount Common stock issued (in shares) Common Stock, Shares, Issued Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Environmental Matters Site Contingency [Line Items] Maximum borrowing capacity under financing arrangement Line of Credit Facility, Maximum Borrowing Capacity Total assets of DBT Disposal Group, Including Discontinued Operation, Assets Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Subsequent Event [Line Items] Subsequent Event [Line Items] Communication technologies, aids to navigation, and transportation systems Communication Technologies, Aids To Navigation, and Transportation Systems [Member] Signal Monitoring, Obstruction Lighting, And Bus Fare Collection Systems [Member] Minimum withholdings paid on behalf of employees for net share settlements, net of proceeds from the exercise of employee stock options Payment (Proceeds), Tax Withholding, Share-Based Payment Arrangement Payment (Proceeds), Tax Withholding, Share-Based Payment Arrangement Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Contract accounts receivable Accounts Receivable, after Allowance for Credit Loss Available borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Debt activity Debt Instrument [Line Items] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Business acquisitions, net of cash acquired Business acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Weighted-average number of common shares outstanding — diluted (in shares) Weighted-average number of common shares and dilutive securities used in diluted income per share (in shares) Weighted Average Number of Shares Outstanding, Diluted MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Estimated annual amortization expense, remainder of the year Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Components of accumulated other comprehensive income, net of tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Total stockholders' equity Balance at beginning of period Balance at end of period Equity, Attributable to Parent Borrowings Proceeds from Issuance of Debt Environmental Remediation Contingency [Axis] Environmental Remediation Contingency [Axis] Triggering Event [Axis] Triggering Event [Axis] Triggering Event Litigation Case [Axis] Litigation Case [Axis] Net income per share of common stock: Business Acquisition, Pro Forma Earnings Per Share [Abstract] Business Acquisition, Pro Forma Earnings Per Share Hedging Designation [Domain] Hedging Designation [Domain] Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Interest expense Interest Expense, Nonoperating Current assets Derivative Asset, Current Schedule of Changes in Goodwill Schedule of Goodwill [Table Text Block] Potential Uncertain Positions Income Tax Uncertainties, Policy [Policy Text Block] Pension and other employee benefits Pension and Other Postretirement Benefits Cost (Reversal of Cost) Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Schedule of Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Depreciation and amortization: Depreciation, Depletion and Amortization [Abstract] Selling, general and administrative Selling, General and Administrative Expense Daily treasury yield curve period upon which average risk-free interest rate is based (years) Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Calculation Period Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Calculation Period Current-period other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Interest accrued Income Tax Examination, Interest Accrued Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Cost of Sales Cost of Sales [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Document Fiscal Period Focus Document Fiscal Period Focus Acquisition-related costs Acquisition related and other costs Business Combination, Acquisition Related Costs All Executive Categories All Executive Categories [Member] Dilutive securities — Employee stock options and restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Estimated annual amortization expense, year two Finite-Lived Intangible Asset, Expected Amortization, Year Two Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Goodwill, expected tax deductible amount Business Acquisition, Goodwill, Expected Tax Deductible Amount AQUISITIONS AND DISCONTINUED OPERATIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] ASSETS Assets [Abstract] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Other comprehensive income (loss), net Other Comprehensive Income (Loss), Net of Tax Annual Expected Dividend Yield Annual expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Document Type Document Type Derivative Contract [Domain] Derivative Contract [Domain] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Schedule of Financial Data for Reportable Segments and Other Operating Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Current SPX Term Loan Facilities Current SPX Term Loan Facilities [Member] Current SPX Term Loan Facilities [Member] Consolidated cash and equivalents, beginning of period Consolidated cash and equivalents, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Raw materials and purchased parts Inventory, Raw Materials and Purchased Parts, Net of Reserves Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Revenues HVAC HVAC reportable segment HVAC Reportable Segment [Member] HVAC Reportable Segment [Member] Deferred compensation assets Deferred Compensation Plan Assets Schedule of Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Risk-Free Interest Rate Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Subsequent Event [Table] Subsequent Event [Table] Trademarks with indefinite lives Trademarks Indefinite-Lived Intangible Assets (Excluding Goodwill) Maximum Maximum [Member] Intangible amortization Amortization of acquired intangible assets Amortization of Intangible Assets Contract liabilities Contract with Customer, Liability Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Accumulated impairment, balance at the beginning of the period Accumulated impairment, balance at the end of the period Goodwill, Impaired, Accumulated Impairment Loss Net Carrying Value Finite-lived intangible assets, net Finite-Lived Intangible Assets, Net Antidilutive Securities [Axis] Antidilutive Securities [Axis] Accounts payable Accounts Payable, Current Net cash from continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Schedule of Black-Scholes Pricing Model Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Fair Value Fair Value Measurement, Policy [Policy Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Tangible Long-Lived Assets: Assets, Noncurrent [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] PEO Name PEO Name Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Historical period upon which annual expected stock price volatility is based (years) Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Expected Volatility Period Based on Historical Volatility Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Expected Volatility Period Based on Historical Volatility Income from continuing operations before income taxes Pre-tax Pre-tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Index Type [Domain] Index Type [Domain] Index type. Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Award Type [Domain] Award Type [Domain] Name Outstanding Recovery, Individual Name Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Schedule of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Revenues recognized over time Transferred over Time [Member] Schedule of Identifiable Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Deferred income taxes Deferred Income Tax Assets, Net Non-PEO NEO Non-PEO NEO [Member] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Paid-In Capital Additional Paid-in Capital [Member] Index Type [Axis] Index Type [Axis] Information by index type. Award Timing Predetermined Award Timing Predetermined [Flag] Subsequent Event Type [Domain] Subsequent Event Type [Domain] EMPLOYEE BENEFIT PLANS Retirement Benefits [Text Block] Deferred and other income taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Customer relationships and contracts Customer Relationships [Member] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Forecast Forecast [Member] Amortization of unrecognized prior service credits Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net income per share (in dollars per share) Earnings Per Share, Diluted Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Schedule of Weighted-Average Shares Outstanding Used in Computation of Basic and Diluted Income per Share Schedule of Weighted Average Number of Shares [Table Text Block] Name Measure Name Special charges Restructuring and Integration Reserves, Period Expense Reserve increase representing the amount charged against earnings in the period for a specified incurred and estimated type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Also includes the amount charged against earnings in the period for integration expenses. Entity Interactive Data Current Entity Interactive Data Current Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Net accrued interest Unrecognized Tax Benefits, Interest on Income Taxes Accrued, Net Represents the net (net of applicable income tax effect) amount of interest expense accrued as of the date of statement of financial position for underpayment of income taxes, computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity. Canada CANADA Retirement Benefits [Abstract] Retirement Benefits [Abstract] Increase (decrease) in accounts receivable Increase (Decrease) in Accounts Receivable, Net Increase (Decrease) in Accounts Receivable, Net Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] China CHINA Acquisitions and Discontinued Operations [Abstract] Acquisitions and Discontinued Operations [Abstract] Acquisitions and Discontinued Operations Trade receivables financing arrangement Asset-Backed Securities [Member] Less: Current portion of warranty Product Warranty Accrual, Current Long-term incentive compensation Share-Based Payment Arrangement, Noncash Expense Gains on pension and postretirement items: Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Income tax provision Income taxes Income Tax Expense (Benefit) Interest cost Defined Benefit Plan, Interest Cost Aggregate notional amount Derivative, Notional Amount Foreign Credit Instrument Facilities Foreign Credit Instrument Facilities [Member] Foreign Credit Instrument Facilities Corporate Corporate expense Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Net periodic pension/postretirement benefit expense Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION Shareholders' Equity and Share-Based Payments [Text Block] Weighted-average period over which unrecognized compensation costs will be recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Revenues Revenue from Contract with Customer, Excluding Assessed Tax Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Operating income Consolidated operating income Operating Income (Loss) Interest expense Interest Expense, Operating and Nonoperating Business Acquisition [Line Items] Business Acquisition [Line Items] Number of reportable segments Number of Reportable Segments TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity SUBSEQUENT EVENTS Subsequent Events [Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] All Adjustments to Compensation All Adjustments to Compensation [Member] Hedging Designation [Axis] Hedging Designation [Axis] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Loss from discontinued operations, net of tax Less: Loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Interest income Investment Income, Interest Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of PSU and RSU Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Scenario [Domain] Scenario [Domain] Individual: Individual [Axis] Common stock (54,410,396 and 46,695,783 issued and outstanding at March 29, 2025, respectively, and 54,196,620 and 46,368,240 issued and outstanding at December 31, 2024, respectively) Common Stock, Value, Outstanding Accum. Other Comprehensive Income AOCI Attributable to Parent [Member] Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Remaining performance obligation, timing of satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Net Unrealized Gains on Qualifying Cash Flow Hedges Gains on qualifying cash flow hedges: Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Expected life of stock option (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Inventories, net Total inventories Inventory, Net Total liabilities of DBT Disposal Group, Including Discontinued Operation, Liabilities Net cash used in continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Product and Service [Axis] Product and Service [Axis] Entity Address, State or Province Entity Address, State or Province Statement [Line Items] Statement [Line Items] Accumulated impairments related to foreign currency translation Accumulated Impairments, Related to Foreign Currency Translation and Other Adjustments Represents the adjustments, during the period, to the accumulated impairments of Goodwill related to foreign currency translation and other adjustments. Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] HVAC HVAC [Member] HVAC Costs and expenses: Operating Expenses [Abstract] Employee Benefit Plans Defined Benefit Plan Disclosure [Line Items] Other long-term liabilities Disposal Group, Including Discontinued Operation, Other Liabilities Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Purchase price Business Combination, Consideration Transferred Outstanding at beginning of period (in dollars per share) Outstanding at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Schedule of Net Periodic Benefit (Income) Expense Schedule of Net Benefit Costs [Table Text Block] Currency Forward Contracts Derivatives, Policy [Policy Text Block] Gross goodwill related to foreign currency translation Gross Goodwill, Related to Foreign Currency Translation and Other Represents the adjustments, during the period, to the gross value of goodwill related to foreign currency translation and other adjustments. Package and process cooling equipment and services, and engineered air movement and handling solutions Package And Process Cooling Equipment And Services, And Engineered Air Movement And Handling Solutions [Member] Represents the package and process cooling equipment and services unit of the entity. Fixed rate Derivative, Fixed Interest Rate Minimum Minimum [Member] Restatement Determination Date Restatement Determination Date Adoption Date Trading Arrangement Adoption Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Contract liabilities - non-current Contract with Customer, Liability, Noncurrent United Kingdom UNITED KINGDOM Increase (decrease) in contract with customers, net Increase (Decrease) in Contract with Customers, Net Increase (Decrease) in Contract with Customers, Net Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Accrued expenses Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current Adjustment, consideration transferred Consideration transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Segments [Axis] Segments [Axis] Other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Revenues Business Acquisition, Pro Forma Revenue Derivative Instrument [Axis] Derivative Instrument [Axis] Exercise Price Award Exercise Price Kranze Technology Solutions, Inc Kranze Technology Solutions, Inc [Member] Kranze Technology Solutions, Inc SPECIAL CHARGES, NET Restructuring, Impairment, and Other Activities Disclosure [Text Block] Arrangement Duration Trading Arrangement Duration Discontinued Operations Discontinued Operations [Member] Subsequent Event Subsequent Event [Member] LEASES Lessee, Finance Leases [Text Block] GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Income from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Income (loss) from discontinued operations, net of tax Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Life insurance, corporate or bank owned, interest rate Life Insurance, Corporate or Bank Owned, Interest Rate Life Insurance, Corporate or Bank Owned, Interest Rate Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Segments [Domain] Segments [Domain] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Finance lease, liability Finance Lease, Liability Estimated annual amortization expense, year four Finite-Lived Intangible Asset, Expected Amortization, Year Four All Individuals All Individuals [Member] Loss from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share PEO PEO [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Name Trading Arrangement, Individual Name Other income (expense), net Other income (expense), net Other Nonoperating Income (Expense) Gross goodwill, beginning of the period Gross goodwill, end of the period Goodwill, Gross Postretirement Plans Other Postretirement Benefits Plan [Member] Schedule of Analysis of Restructuring Liabilities Schedule of Restructuring and Integrated Liabilities [Table Text Block] Tabular disclosure to roll forward the entity's restructuring and integration reserves associated with the exit from or disposal of business activities or restructuring for the period. Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Intangibles, net Net Carrying Value Intangible Assets, Net (Excluding Goodwill) Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Sigma & Omega Sigma & Omega [Member] Sigma & Omega Site investigation and remediation Environmental Issue [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Common stock in treasury (7,714,613 and 7,828,380 shares at March 29, 2025 and December 31, 2024, respectively) Treasury Stock, Common, Value Income from continuing operations Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax Assets acquired: Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Diluted (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Total long-term liabilities Liabilities, Noncurrent Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Special Charges, Net Restructuring Cost and Reserve [Line Items] Local Phone Number Local Phone Number Additional Swaps Interest Rate Swap, Through November 2024 [Member] Interest Rate Swap, Through November 2024 Gross Carrying Value Intangible Assets, Gross (Excluding Goodwill) WARRANTY Product Warranty Disclosure [Text Block] Balance at the beginning of the period Balance at the end of the period Debt, Long-Term and Short-Term, Combined Amount Total cash and equivalents Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Foreign credit instrument facility Foreign Line of Credit [Member] Corporate expense Operating Expenses Number of large power projects Number Of Large Power Projects Number Of Large Power Projects Annual Expected Stock Price Volatility Annual expected stock price volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Shares repurchase (in shares) Stock Repurchased During Period, Shares Interest Rate Swap, From December 2024 Interest Rate Swap, From December 2024 [Member] Interest Rate Swap, From December 2024 Current Revolving SPX Facilities Current Revolving SPX Facilities [Member] Current Revolving SPX Facilities [Member] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Changes in operating assets and liabilities, net of effects from acquisitions and divestitures: Increase (Decrease) in Operating Capital [Abstract] PEO Total Compensation Amount PEO Total Compensation Amount Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Long-lived assets of continuing operations Long-lived Assets of Continuing Operations Long-lived Assets of Continuing Operations CONTINGENT LIABILITIES AND OTHER MATTERS Commitments and Contingencies Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Restricted stock unit vesting Restricted Stock, Value, Shares Issued Net of Tax Withholdings Common Stock Common Stock [Member] Measure: Measure [Axis] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] 2022 and 2023 Debt Instrument, Redemption, Period One [Member] Line of Credit Line of Credit [Member] Penalties accrued Unrecognized Tax Benefits, Income Tax Penalties Accrued Entity Emerging Growth Company Entity Emerging Growth Company Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key Scenario [Axis] Scenario [Axis] Borrowings from life insurance policies Borrowings From Life Insurance Policies Borrowings From Life Insurance Policies Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Periodic payment (as a percent of principal) Debt Instrument, Periodic Payment, Percentage Of Principal Debt Instrument, Periodic Payment, Percentage Of Principal Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Provisions Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Accounts payable, accrued expenses and other Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Component [Domain] Equity Component [Domain] Acquisitions Standard and Extended Product Warranty Accrual, Additions from Business Acquisition Other current assets Disposal Group, Including Discontinued Operation, Other Assets, Current INFORMATION ON REPORTABLE SEGMENTS Segment Reporting Disclosure [Text Block] Current maturities of long-term debt Less: current maturities of long-term debt Long-Term Debt, Current Maturities Non-current portion of warranty Product Warranty Accrual, Noncurrent Detection and Measurement Detection and Measurement reportable segment Cost of product sold Detection and Measurement Reportable Segment [Member] Detection and Measurement Reportable Segment [Member] Borrowings under trade receivables arrangement Borrowing under Trade Receivables Agreement The cash inflow from the trade receivables agreement during the period. Net cash used in discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Adjustments to reconcile income from continuing operations to net cash from (used in) operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] NEW ACCOUNTING PRONOUNCEMENTS Accounting Standards Update and Change in Accounting Principle [Text Block] Incentive plan activity APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Title Trading Arrangement, Individual Title Deferred and other income taxes Deferred Income Taxes and Other Tax Liabilities, Noncurrent Accruals included in other long-term liabilities Loss Contingency, Accrual, Noncurrent Statement [Table] Statement [Table] Acquisition-Related And Other Costs Acquisition-Related And Other Costs [Member] Acquisition-Related And Other Costs Gross unrecognized tax benefits Unrecognized Tax Benefits Consolidation Items [Domain] Consolidation Items [Domain] Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] City Area Code City Area Code Black-Scholes Option-Pricing Model [Table] Black-Scholes Option-Pricing Model [Table] Black-Scholes Option-Pricing Model Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Current liabilities: Liabilities, Current [Abstract] Loss from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Number of countries in which entity operates Number of Countries in which Entity Operates Disposal Group Classification [Domain] Disposal Group Classification [Domain] Property, plant and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Capital expenditures Payments to Acquire Productive Assets Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Amount of available borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Derivative Financial Instruments Summary of Derivative Instruments [Abstract] Schedule of Debt Instruments [Table] Schedule of Debt Instruments [Table] A table or schedule providing information pertaining to short-term and long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. Assets of DBT and Heat Transfer (includes cash and equivalents of $4.4 and $4.5 at March 29, 2025 and December 31, 2024, respectively) (Note 3) Assets of Abandoned Entities Assets of Abandoned Entities Fair value of stock option grants (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] DBT Technologies DBT Technologies [Member] DBT Technologies [Member] Restructuring liabilities Restructuring Reserve [Roll Forward] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Other Other Intangible Assets [Member] Remaining performance obligation Revenue, Remaining Performance Obligation, Percentage INCOME AND OTHER TAXES Income Tax Disclosure [Text Block] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Income Per Share Earnings Per Share [Abstract] Equity [Abstract] Repayments under trade receivables arrangement Repayments under Trade Receivables Agreement The cash outflow for the trade receivables agreement during the period. Current assets, including cash and equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Amounts Reclassified from Each Component of Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Domestic Plan Domestic Plan [Member] Inventories Increase (Decrease) in Inventories Schedule of Debt Activity, Current and Noncurrent Schedule of Debt [Table Text Block] Deferred and other income taxes Deferred Income Taxes and Tax Credits Litigation settlement awarded to other party Litigation Settlement, Amount Awarded to Other Party Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Net cash from financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Payment for bonds Payment for Debt Extinguishment or Debt Prepayment Cost Performance Shares Performance Shares [Member] Credit Facility [Axis] Credit Facility [Axis] Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Revenues recognized at a point in time Transferred at Point in Time [Member] Gross receivables acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Depreciation and amortization Total depreciation and amortization Depreciation, Depletion and Amortization Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Schedule of Warranty Accrual Schedule of Product Warranty Liability [Table Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Immaterial Acquisition Immaterial Acquisition [Member] Immaterial Acquisition Subsequent Events [Abstract] Subsequent Events [Abstract] Unamortized debt issuance costs Debt Issuance Costs, Net INDEBTEDNESS Debt Disclosure [Text Block] Amortization period Finite-Lived Intangible Assets, Remaining Amortization Period Stockholders' Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Face amount of debt Debt Instrument, Face Amount Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Balance at beginning of year Balance at end of period Standard and Extended Product Warranty Accrual Entity Address, Postal Zip Code Entity Address, Postal Zip Code Type of Arrangement and Non-arrangement Transactions [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Swaps Interest Rate Swap [Member] Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Restatement Determination Date: Restatement Determination Date [Axis] Arrangements and Non-arrangement Transactions [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Title of 12(b) Security Title of 12(b) Security Peer group within S&P 600 Small Cap Capital Goods Index and S&P 400 Mid Cap Capital Goods Index Peer Group Within S&P 600 Small Cap Capital Goods Index And S&P 400 Mid Cap Capital Goods Index [Member] S&P 600 Capital Goods Index [Member] Fiscal Period Fiscal Period, Policy [Policy Text Block] Land Land Loss from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net of tax provision (benefit) AOCI Tax, Attributable to Parent Cash and equivalents Cash and equivalents Cash and Cash Equivalents, at Carrying Value Other Noncurrent Assets Other Noncurrent Assets [Member] Triggering Event [Domain] Triggering Event [Domain] Triggering Event [Domain] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Underground locators, inspection and rehabilitation equipment, and robotic systems Underground Locators, Inspection And Rehabilitation Equipment, And Robotic Systems [Member] Underground Locators, Inspection And Rehabilitation Equipment, And Robotic Systems Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Indefinite-lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Number of sites Site Contingency, Number of Sites Represents the number of sites which have liabilities for site investigation and remediation. Cash flows from (used in) financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] SPX Heat Transfer Business SPX Heat Transfer Business [Member] SPX Heat Transfer Business [Member] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Net income per share (in dollars per share) Earnings Per Share, Basic Repayments under senior credit facilities Repayments under Senior Credit Facilities The cash outflow from the senior credit facilities during the period. Excess tax provision from stock-based compensation awards vested Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Cash acquired Cash Acquired from Acquisition Environmental Remediation Contingency [Domain] Environmental Remediation Contingency [Domain] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Analysis of product warranty accrual Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Maximum contractual term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Diluted (in dollars per share) Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Diluted Current liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Trademarks with indefinite lives Trademarks Trademarks [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Schedule of Goodwill [Table] Goodwill [Table] Derivative contracts designated as hedging instruments Designated as Hedging Instrument [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Machinery and equipment Machinery and Equipment, Gross Compensation costs not yet recognized Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount TOTAL ASSETS Assets Amortization of deferred compensation asset Amortization of Deferred Compensation Plan Asset Amortization of Deferred Compensation Plan Asset Estimated annual amortization expense, year one Finite-Lived Intangible Asset, Expected Amortization, Year One Cost of products sold Cost of Goods and Services Sold Cash and equivalents included in assets of DBT and Heat Transfer Cash and Cash Equivalents Included In Assets of Abandoned Entities Cash and Cash Equivalents Included In Assets of Abandoned Entities Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Other long-term liabilities Other Liabilities, Noncurrent Employee retention agreement term Employee Retention Agreement Term Employee Retention Agreement Term Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Commitments and contingent liabilities (Note 15) Commitments and Contingencies Termination Date Trading Arrangement Termination Date Boilers, electrical heating, and ventilation Boiler, Comfort, Heating And Ventilation [Member] Boiler, Comfort, Heating And Ventilation Revenues Revenues Net contract balance Contract with Customers, Net Contract with Customers, Net Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Long-term incentive compensation expense Share-Based Payment Arrangement, Expense Net income Net income Net income Net income (loss) Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Exercise price per share (in dollars per share) Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Business Acquisition [Axis] Business Acquisition [Axis] Schedule of Assumptions to Determine the Fair Value of Restricted Stock Awards Schedule of Share Based Payment Award, Restricted Stock Activity Valuation Assumptions [Table Text Block] Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock activity, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected annual volatility of the entity's shares, (c) expected annual dividend yields, (d) risk-free interest rate(s), and (e) correlation between total shareholder return for SPX and S&P 500 composite index and the S&P Composite 1500 Industrial Index. Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Backlog Customer Backlog [Member] Customer Backlog Property, plant and equipment: Property, Plant and Equipment, Net [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number Increase (decrease) in contract with customer, liability, noncurrent Increase (Decrease) in Contract with Customer, Liability, Noncurrent Increase (Decrease) in Contract with Customer, Liability, Noncurrent Domestic Revolving Loan Facility Domestic Revolving Loan Facility [Member] Domestic Revolving Loan Facility REVENUES FROM CONTRACTS Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Number of countries in which entity sells its products and services Number of Countries in which Entity Sells its Products and Services Represents the number of countries in which the entity sells its products and services. Accounts receivable and other assets Increase (Decrease) in Accounts Receivable and Other Operating Assets Entity Address, Address Line Two Entity Address, Address Line Two Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Change in cash and equivalents due to changes in foreign currency exchange rates Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Name Forgone Recovery, Individual Name Loss on settlement Defined Benefit Plan, Benefit Obligation, Loss on Settlement Defined Benefit Plan, Benefit Obligation, Loss on Settlement Document Period End Date Document Period End Date Finished goods Inventory, Finished Goods, Net of Reserves Other, net Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Realized gain on fair value adjustment Equity Securities, FV-NI, Realized Gain Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Insider Trading Arrangements [Line Items] Basic (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Buildings and leasehold improvements Buildings and Improvements, Gross Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Other Current Assets Other Current Assets [Member] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Contract with customer, revenue recognized Contract with Customer, Liability, Revenue Recognized Remeasurement due to settlement Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement Adjustment to Compensation: Adjustment to Compensation [Axis] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Litigation Case [Domain] Litigation Case [Domain] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Inventory acquired and subsequently sold Inventory Acquired And Subsequently Sold Inventory Acquired And Subsequently Sold Retained Earnings Retained Earnings [Member] Other Long Term Liabilities Other Long Term Liabilities [Member] Other Long Term Liabilities [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Site Contingency [Table] Site Contingency [Table] Accrual for environmental loss contingencies Accrual for Environmental Loss Contingencies, Gross Resolution of Dispute with Former Agent Resolution of Dispute with Former Agent [Member] Resolution of Dispute with Former Agent Weighted-average number of common shares outstanding — basic (in shares) Weighted-average number of common shares used in basic income per share (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Recognized net actuarial loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Term loan Medium-Term Note [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Special charges, net Special charges, net Special Charges, Net Amount charged against earnings in the period for incurred and estimated costs associated with an exit from business activities or restructuring pursuant to a duly authorized plan, excluding asset retirement obligations. Such costs include charges associated with employee terminations, lease terminations, asset impairments, etc. Entity Filer Category Entity Filer Category Amounts reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Proceeds related to company-owned life insurance policies, net Proceeds from Life Insurance Policy Remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Contingent Liabilities and Other Matters Loss Contingencies [Line Items] Letter of Credit Letter of Credit [Member] Company Selected Measure Name Company Selected Measure Name Schedule of Special Charges Schedule of Restructuring Impairment and Other Activities by Segment [Table Text Block] Tabular disclosure of the restructuring, impairment and other related charges by reporting segment of the entity.