Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Our significant accounting policies are described below, as well as in other Notes that follow. Unless otherwise indicated, amounts provided in these Notes pertain to continuing operations only (see Note 4 for information on discontinued operations). Principles of Consolidation — The consolidated financial statements include SPX Corporation’s (“SPX”, “our”, or “we”) accounts prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) after the elimination of intercompany transactions. Investments in unconsolidated companies where we exercise significant influence but do not have control are accounted for using the equity method. In determining whether we are the primary beneficiary of a variable interest entity (“VIE”), we perform a qualitative analysis that considers the design of the VIE, the nature of our involvement and the variable interests held by other parties to determine which party has the power to direct the activities of the VIE that most significantly impact the entity’s economic performance, and which party has the obligation to absorb losses or the right to receive benefits of the entity that could potentially be significant to the VIE. We have an interest in a VIE, in which we are not the primary beneficiary, as a result of the sale of Balcke Dürr. See below and in Notes 2, 4 and 17 for further discussion of the Balcke Dürr sale. All other VIEs are considered immaterial, individually and in aggregate, to our consolidated financial statements. Shift Away from the Power Generation Markets — On September 26, 2015, we completed the spin-off to our stockholders (the “Spin-Off”) of all the outstanding shares of SPX FLOW, Inc., a wholly-owned subsidiary of SPX prior to the Spin-Off, which at the time of the Spin-Off held the businesses comprising our Flow Technology reportable segment, our Hydraulic Technologies business, and certain of our corporate subsidiaries. Prior to the Spin-Off, our businesses serving the power generation markets had a major impact on the consolidated financial results of SPX. In the years leading up to the Spin-Off, these businesses experienced significant declines in revenues and profitability associated with weak demand and increased competition within the global power generation markets. Based on a review of our post-spin portfolio and the belief that a recovery within the power generation markets was unlikely in the foreseeable future, we decided that our strategic focus would be on our (i) scalable growth businesses that serve the heating, ventilation and cooling (“HVAC”) and detection and measurement markets and (ii) power transformer and process cooling systems businesses. As a result, we have significantly reduced our exposure to the power generation markets as indicated by the activities summarized below: •Sale of Dry Cooling Business – On March 30, 2016, we completed the sale of our dry cooling business, a business that provides dry cooling systems to the global power generation markets. •Sale of Balcke Dürr Business – On December 30, 2016, we completed the sale of Balcke Dürr, a business that provides heat exchangers and other related components to the European and Asian power generation markets. Balcke Dürr historically had been the most significant of our power generation businesses. As we considered the disposition of Balcke Dürr to be the cornerstone of our strategic shift away from the power generation markets, and given the significance of Balcke Dürr’s financial results to our overall operations prior to its disposition, we began classifying Balcke Dürr as a discontinued operation at the time of its disposition. See Note 4 for additional details. •Wind-Down of the SPX Heat Transfer Business – After an unsuccessful attempt to sell the SPX Heat Transfer (“Heat Transfer”) business, and as a continuation of our strategic shift away from power generation markets, we initiated a wind-down plan for the business. In connection with this plan, we recorded charges of $3.5 in 2018, with $0.9 related to the write-down of inventory, $0.6 related to the impairment of machinery and equipment and $2.0 to severance costs. In addition, we sold intangible assets of the business in 2018 for cash proceeds of $4.8, which resulted in a gain of less than $0.1. During 2019, we completed the sale of Heat Transfer's manufacturing facility for cash proceeds of $5.5, which resulted in a gain of $0.3. During the fourth quarter of 2020, we completed the plan, which included providing all products and services on the business’s remaining contracts with customers. As a result, we are reporting Heat Transfer as a discontinued operation in the accompanying consolidated financial statements. See Note 4 for additional details. Acquisitions in 2020: •ULC – On September 2, 2020, we completed the acquisition of ULC Robotics (“ULC”), a leading developer of robotic systems, machine learning applications, and inspection technology for the energy, utility, and industrial markets, for cash proceeds of $89.2, net of cash acquired of $4.0. Under the terms of the purchase and sales agreement, the seller is eligible for additional cash consideration of up to $45.0, with payments scheduled to be made in 2021 and 2022 upon successful achievement of certain operational and financial performance milestones. The estimated fair value of such contingent consideration is $24.3, which is reflected as a liability in the accompanying consolidated balance sheet as of December 31, 2020. The post-acquisition operating results of ULC are reflected within our Detection and Measurement reportable segment. •Sensors & Software – On November 11, 2020, we completed the acquisition of Sensors & Software Inc. (“Sensors & Software“), a leading manufacturer and distributor of ground penetrating radar products used for locating underground utilities, detecting unexploded ordinances, and geotechnical and geological investigations, for cash proceeds of $15.2, net of cash acquired of $0.3. Under the terms of the purchase and sales agreement, the seller is eligible for additional cash consideration of up to $3.9, with payment scheduled to be made in 2021 upon successful achievement of a financial performance milestone during the twelve months following the date of acquisition. The estimated fair value of such contingent consideration is $0.7, which is reflected as a liability in the accompanying consolidated balance sheet as of December 31, 2020. In addition, the purchase price is subject to adjustment based on the final calculation of working capital, cash, and debt as of the date of the acquisition. The post-acquisition operating results of Sensors & Software are reflected within our Detection and Measurement reportable segment. The assets acquired and liabilities assumed in the ULC and Sensors & Software transactions have been recorded at estimates of fair value as determined by management, based on information available and assumptions as to future operations and are subject to change, primarily for the final assessment and valuation of certain income tax amounts. Acquisitions in 2019: •Sabik – On February 1, 2019, we completed the acquisition of Sabik Marine (“Sabik”), primarily a manufacturer of obstruction lighting products, for a purchase price of $77.2, net of cash acquired of $0.6. The post-acquisition operating results of Sabik are reflected within our Detection and Measurement reportable segment. •SGS – On July 3, 2019, we completed the acquisition of SGS Refrigeration Inc. (“SGS”), a manufacturer of industrial refrigeration products, for cash proceeds of $11.5, including contingent consideration of $1.5 that was paid during the first quarter of 2020. The post-acquisition operating results of SGS are reflected within our HVAC reportable segment. •Patterson-Kelley – On November 12, 2019, we completed the acquisition of Patterson-Kelley, LLC (“Patterson-Kelley”), a manufacturer and distributor of commercial boilers and water heaters, for cash proceeds of $59.9. The post-acquisition operating results of Patterson-Kelley are reflected within our HVAC reportable segment. Acquisitions in 2018: •Schonstedt - On March 1, 2018, we completed the acquisition of Schonstedt Instrument Company (“Schonstedt”), a manufacturer and distributor of magnetic locator products used for locating underground utilities and other buried objects, for a purchase price of $16.4, net of cash acquired of $0.3. The post-acquisition operating results of Schonstedt are reflected within our Detection and Measurement reportable segment. •Cues - On June 7, 2018, we completed the acquisition of Cues, Inc. (“Cues”), a manufacturer of pipeline inspection and rehabilitation equipment. The acquisition was completed through the purchase of all of the issued and outstanding shares of Cues’ parent company for a purchase price of $164.4, net of cash acquired of $20.6. The post-acquisition operating results of Cues are reflected within our Detection and Measurement reportable segment. See Note 4 for additional details on the Cues acquisition. Foreign Currency Translation and Transactions — The financial statements of our foreign subsidiaries are translated into U.S. dollars in accordance with the Foreign Currency Matters Topic of the Financial Accounting Standards Board Codification (“Codification”). Gains and losses on foreign currency translations are reflected as a separate component of equity and other comprehensive income. Foreign currency transaction gains and losses, as well as gains and losses related to foreign currency forward contracts and currency forward embedded derivatives, are included in “Other income (expense), net,” with the related net gains (losses) totaling $1.3, $(1.5) and $(0.3) in 2020, 2019 and 2018, respectively. Cash Equivalents — We consider highly liquid money market investments with original maturities of three months or less at the date of purchase to be cash equivalents. Revenue Recognition — We recognize revenue in accordance with Accounting Standards Codification (“ASC”) 606. See Note 5 for our policy for recognizing revenue under ASC 606 as well as the various other disclosures required by ASC 606. Research and Development Costs — We expense research and development costs as incurred. We charge costs incurred in the research and development of new software included in products to expense until technological feasibility is established. After technological feasibility is established, additional eligible costs are capitalized until the product is available for general release. We amortize these costs over the economic lives of the related products and include the amortization in cost of products sold. We perform periodic reviews of the recoverability of these capitalized software costs. At the time we determine that capitalized amounts are not recoverable based on the estimated cash flows to be generated from the applicable software, we write off any unrecoverable capitalized amounts. Capitalized software, net of amortization, totaled $1.3 and $3.8 as of December 31, 2020 and 2019, respectively. Capitalized software amortization expense totaled $2.5 in 2020, and $2.4 in both 2019 and 2018. We expensed research activities relating to the development and improvement of our products of $28.4, $24.8 and $22.9 in 2020, 2019 and 2018, respectively. Property, Plant and Equipment — Property, plant and equipment (“PP&E”) is stated at cost, less accumulated depreciation. We use the straight-line method for computing depreciation expense over the useful lives of PP&E, which do not exceed 40 years for buildings and range from 3 to 15 years for machinery and equipment. Depreciation expense, including amortization of finance leases, was $25.2, $22.9 and $21.4 for the years ended December 31, 2020, 2019 and 2018, respectively. Leasehold improvements are amortized over the life of the related asset or the life of the lease, whichever is shorter. Interest is capitalized on significant construction or installation projects. No interest was capitalized during 2020, 2019 or 2018. Pension and Postretirement — We recognize changes in the fair value of plan assets and actuarial gains and losses in earnings during the fourth quarter of each year, unless earlier remeasurement is required, as a component of net periodic benefit expense and, accordingly, recognize the effects of plan investment performance, interest rate changes, and changes in actuarial assumptions as a component of earnings in the year in which they occur. The remaining components of pension/postretirement expense, primarily interest costs and expected return on plan assets, are recorded on a quarterly basis. Income Taxes — We account for income taxes based on the requirements of the Income Taxes Topic of the Codification, which includes an estimate of the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in our consolidated financial statements or tax returns. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We periodically assess the realizability of deferred tax assets and the adequacy of deferred tax liabilities, including the results of local, state, federal or foreign statutory tax audits or estimates and judgments used. Derivative Financial Instruments — We use foreign currency forward contracts to manage our exposures to fluctuating currency exchange rates, forward contracts to manage the exposure on forecasted purchases of commodity raw materials (“commodity contracts”) and interest rate protection agreements to manage our exposures to fluctuating interest rate risk on variable rate debt. Derivatives are recorded on the balance sheet and measured at fair value. For derivatives designated as hedges of the fair value of assets or liabilities, the changes in fair values of both the derivatives and the hedged items are recorded in current earnings. For derivatives designated as cash flow hedges, the change in fair value of the derivatives is recorded in accumulated other comprehensive income (“AOCI”) and subsequently recognized in earnings when the forecasted transaction impacts earnings. We do not enter into financial instruments for speculative or trading purposes. For those transactions that are designated as cash flow hedges, on the date the derivative contract is entered into, we document our hedge relationship, including identification of the hedging instruments and the hedged items, as well as our risk management objectives and strategies for undertaking the hedge transaction. We also assess, both at inception and quarterly thereafter, whether such derivatives are highly effective in offsetting changes in the fair value of the hedged item. See Notes 14 and 16 for further information. Cash flows from hedging activities are included in the same category as the items being hedged, which are primarily operating activities. Reclassification of Prior Years’ Amounts – Certain prior years’ amounts have been reclassified to conform to the current year presentation, including amounts related to the inclusion of Heat Transfer within discontinued operations.

Principles of Consolidation — The consolidated financial statements include SPX Corporation’s (“SPX”, “our”, or “we”) accounts prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) after the elimination of intercompany transactions. Investments in unconsolidated companies where we exercise significant influence but do not have control are accounted for using the equity method. In determining whether we are the primary beneficiary of a variable interest entity (“VIE”), we perform a qualitative analysis that considers the design of the VIE, the nature of our involvement and the variable interests held by other parties to determine which party has the power to direct the activities of the VIE that most significantly impact the entity’s economic performance, and which party has the obligation to absorb losses or the right to receive benefits of the entity that could potentially be significant to the VIE. We have an interest in a VIE, in which we are not the primary beneficiary, as a result of the sale of Balcke Dürr. See below and in Notes 2, 4 and 17 for further discussion of the Balcke Dürr sale. All other VIEs are considered immaterial, individually and in aggregate, to our consolidated financial statements.

Shift Away from the Power Generation Markets — On September 26, 2015, we completed the spin-off to our stockholders (the “Spin-Off”) of all the outstanding shares of SPX FLOW, Inc., a wholly-owned subsidiary of SPX prior to the Spin-Off, which at the time of the Spin-Off held the businesses comprising our Flow Technology reportable segment, our Hydraulic Technologies business, and certain of our corporate subsidiaries. Prior to the Spin-Off, our businesses serving the power generation markets had a major impact on the consolidated financial results of SPX. In the years leading up to the Spin-Off, these businesses experienced significant declines in revenues and profitability associated with weak demand and increased competition within the global power generation markets. Based on a review of our post-spin portfolio and the belief that a recovery within the power generation markets was unlikely in the foreseeable future, we decided that our strategic focus would be on our (i) scalable growth businesses that serve the heating, ventilation and cooling (“HVAC”) and detection and measurement markets and (ii) power transformer and process cooling systems businesses. As a result, we have significantly reduced our exposure to the power generation markets as indicated by the activities summarized below:

•Sale of Balcke Dürr Business – On December 30, 2016, we completed the sale of Balcke Dürr, a business that provides heat exchangers and other related components to the European and Asian power generation markets. Balcke Dürr historically had been the most significant of our power generation businesses. As we considered the disposition of Balcke Dürr to be the cornerstone of our strategic shift away from the power generation markets, and given the significance of Balcke Dürr’s financial results to our overall operations prior to its disposition, we began classifying Balcke Dürr as a discontinued operation at the time of its disposition. See Note 4 for additional details.

•Wind-Down of the SPX Heat Transfer Business – After an unsuccessful attempt to sell the SPX Heat Transfer (“Heat Transfer”) business, and as a continuation of our strategic shift away from power generation markets, we initiated a wind-down plan for the business. In connection with this plan, we recorded charges of $3.5 in 2018, with $0.9 related to the write-down of inventory, $0.6 related to the impairment of machinery and equipment and $2.0 to severance costs. In addition, we sold intangible assets of the business in 2018 for cash proceeds of $4.8, which resulted in a gain of less than $0.1. During 2019, we completed the sale of Heat Transfer's manufacturing facility for cash proceeds of $5.5, which resulted in a gain of $0.3. During the fourth quarter of 2020, we completed the plan, which included providing all products and services on the business’s remaining contracts with customers. As a result, we are reporting Heat Transfer as a discontinued operation in the accompanying consolidated financial statements. See Note 4 for additional details.

•ULC – On September 2, 2020, we completed the acquisition of ULC Robotics (“ULC”), a leading developer of robotic systems, machine learning applications, and inspection technology for the energy, utility, and industrial markets, for cash proceeds of $89.2, net of cash acquired of $4.0. Under the terms of the purchase and sales agreement, the seller is eligible for additional cash consideration of up to $45.0, with payments scheduled to be made in 2021 and 2022 upon

successful achievement of certain operational and financial performance milestones. The estimated fair value of such contingent consideration is $24.3, which is reflected as a liability in the accompanying consolidated balance sheet as of December 31, 2020. The post-acquisition operating results of ULC are reflected within our Detection and Measurement reportable segment.

•Sensors & Software – On November 11, 2020, we completed the acquisition of Sensors & Software Inc. (“Sensors & Software“), a leading manufacturer and distributor of ground penetrating radar products used for locating underground utilities, detecting unexploded ordinances, and geotechnical and geological investigations, for cash proceeds of $15.2, net of cash acquired of $0.3. Under the terms of the purchase and sales agreement, the seller is eligible for additional cash consideration of up to $3.9, with payment scheduled to be made in 2021 upon successful achievement of a financial performance milestone during the twelve months following the date of acquisition. The estimated fair value of such contingent consideration is $0.7, which is reflected as a liability in the accompanying consolidated balance sheet as of December 31, 2020. In addition, the purchase price is subject to adjustment based on the final calculation of working capital, cash, and debt as of the date of the acquisition. The post-acquisition operating results of Sensors & Software are reflected within our Detection and Measurement reportable segment.

The assets acquired and liabilities assumed in the ULC and Sensors & Software transactions have been recorded at estimates of fair value as determined by management, based on information available and assumptions as to future operations and are subject to change, primarily for the final assessment and valuation of certain income tax amounts.

•Sabik – On February 1, 2019, we completed the acquisition of Sabik Marine (“Sabik”), primarily a manufacturer of obstruction lighting products, for a purchase price of $77.2, net of cash acquired of $0.6. The post-acquisition operating results of Sabik are reflected within our Detection and Measurement reportable segment.

•SGS – On July 3, 2019, we completed the acquisition of SGS Refrigeration Inc. (“SGS”), a manufacturer of industrial refrigeration products, for cash proceeds of $11.5, including contingent consideration of $1.5 that was paid during the first quarter of 2020. The post-acquisition operating results of SGS are reflected within our HVAC reportable segment.

•Patterson-Kelley – On November 12, 2019, we completed the acquisition of Patterson-Kelley, LLC (“Patterson-Kelley”), a manufacturer and distributor of commercial boilers and water heaters, for cash proceeds of $59.9. The post-acquisition operating results of Patterson-Kelley are reflected within our HVAC reportable segment.

•Schonstedt - On March 1, 2018, we completed the acquisition of Schonstedt Instrument Company (“Schonstedt”), a manufacturer and distributor of magnetic locator products used for locating underground utilities and other buried objects, for a purchase price of $16.4, net of cash acquired of $0.3. The post-acquisition operating results of Schonstedt are reflected within our Detection and Measurement reportable segment.

•Cues - On June 7, 2018, we completed the acquisition of Cues, Inc. (“Cues”), a manufacturer of pipeline inspection and rehabilitation equipment. The acquisition was completed through the purchase of all of the issued and outstanding shares of Cues’ parent company for a purchase price of $164.4, net of cash acquired of $20.6. The post-acquisition operating results of Cues are reflected within our Detection and Measurement reportable segment. See Note 4 for additional details on the Cues acquisition.

Foreign Currency Translation and Transactions — The financial statements of our foreign subsidiaries are translated into U.S. dollars in accordance with the Foreign Currency Matters Topic of the Financial Accounting Standards Board Codification (“Codification”). Gains and losses on foreign currency translations are reflected as a separate component of equity and other comprehensive income. Foreign currency transaction gains and losses, as well as gains and losses related to foreign currency forward contracts and currency forward embedded derivatives, are included in “Other income (expense), net,” with the related net gains (losses) totaling $1.3, $(1.5) and $(0.3) in 2020, 2019 and 2018, respectively.

Research and Development Costs — We expense research and development costs as incurred. We charge costs incurred in the research and development of new software included in products to expense until technological feasibility is established. After technological feasibility is established, additional eligible costs are capitalized until the product is available for general release. We amortize these costs over the economic lives of the related products and include the amortization in cost of products sold. We perform periodic reviews of the recoverability of these capitalized software costs. At the time we determine that capitalized amounts are not recoverable based on the estimated cash flows to be generated from the applicable software, we write off any unrecoverable capitalized amounts. Capitalized software, net of amortization, totaled $1.3 and $3.8 as of December 31, 2020 and 2019, respectively. Capitalized software amortization expense totaled $2.5 in 2020, and $2.4 in both 2019 and 2018. We expensed research activities relating to the development and improvement of our products of $28.4, $24.8 and $22.9 in 2020, 2019 and 2018, respectively.

Property, Plant and Equipment — Property, plant and equipment (“PP&E”) is stated at cost, less accumulated depreciation. We use the straight-line method for computing depreciation expense over the useful lives of PP&E, which do not exceed 40 years for buildings and range from 3 to 15 years for machinery and equipment. Depreciation expense, including amortization of finance leases, was $25.2, $22.9 and $21.4 for the years ended December 31, 2020, 2019 and 2018, respectively. Leasehold improvements are amortized over the life of the related asset or the life of the lease, whichever is shorter. Interest is capitalized on significant construction or installation projects. No interest was capitalized during 2020, 2019 or 2018.

Pension and Postretirement — We recognize changes in the fair value of plan assets and actuarial gains and losses in earnings during the fourth quarter of each year, unless earlier remeasurement is required, as a component of net periodic benefit expense and, accordingly, recognize the effects of plan investment performance, interest rate changes, and changes in actuarial assumptions as a component of earnings in the year in which they occur. The remaining components of pension/postretirement expense, primarily interest costs and expected return on plan assets, are recorded on a quarterly basis.

Income Taxes — We account for income taxes based on the requirements of the Income Taxes Topic of the Codification, which includes an estimate of the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in our consolidated financial statements or tax returns. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We periodically assess the realizability of deferred tax assets and the adequacy of deferred tax liabilities, including the results of local, state, federal or foreign statutory tax audits or estimates and judgments used.

Derivative Financial Instruments — We use foreign currency forward contracts to manage our exposures to fluctuating currency exchange rates, forward contracts to manage the exposure on forecasted purchases of commodity raw materials (“commodity contracts”) and interest rate protection agreements to manage our exposures to fluctuating interest rate risk on variable rate debt. Derivatives are recorded on the balance sheet and measured at fair value. For derivatives designated as hedges of the fair value of assets or liabilities, the changes in fair values of both the derivatives and the hedged items are recorded in current earnings. For derivatives designated as cash flow hedges, the change in fair value of the derivatives is recorded in accumulated other comprehensive income (“AOCI”) and subsequently recognized in earnings when the forecasted transaction impacts earnings. We do not enter into financial instruments for speculative or trading purposes.

For those transactions that are designated as cash flow hedges, on the date the derivative contract is entered into, we document our hedge relationship, including identification of the hedging instruments and the hedged items, as well as our risk management objectives and strategies for undertaking the hedge transaction. We also assess, both at inception and quarterly thereafter, whether such derivatives are highly effective in offsetting changes in the fair value of the hedged item. See Notes 14 and 16 for further information.