Derivative Financial Instruments and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Concentrations of Credit Risk	Derivative Financial Instruments and Concentrations of Credit Risk Interest Rate Swaps We previously maintained interest rate swap agreements that matured in March 2021 and effectively converted borrowings under our senior credit facilities to a fixed rate of 2.535%, plus the applicable margin. In February 2020, and as a result of a December 2019 amendment that extended the maturity date of our senior credit facilities to December 17, 2024, we entered into additional interest swap agreements (“Swaps”). The Swaps have a notional amount of $243.7, cover the period from March 2021 to November 2024, and effectively convert borrowings under our senior credit facilities to a fixed rate of 1.061%, plus the applicable margin. We have designated and are accounting for our interest rate swap agreements as cash flow hedges. As of December 31, 2021 and 2020, the unrealized gain (loss), net of tax, recorded in AOCI was $0.5 and $(5.9), respectively. In addition, as of December 31, 2021, the fair value of our interest rate swap agreements was $0.6 (with $2.5 recorded as a non-current asset and $1.9 as a current liability), and $7.8 at December 31, 2020 (with $1.4 recorded as a current liability and the remainder in long-term liabilities). Changes in fair value of our interest rate swap agreements are reclassified into earnings as a component of interest expense, when the forecasted transaction impacts earnings. Currency Forward Contracts We manufacture and sell our products in a number of countries and, as a result, are exposed to movements in foreign currency exchange rates. Our objective is to preserve the economic value of non-functional currency-denominated cash flows and to minimize the impact of changes as a result of currency fluctuations. Our principal currency exposures relate to the South African Rand, British Pound Sterling, and Euro. From time to time, we enter into forward contracts to manage the exposure on contracts with forecasted transactions denominated in non-functional currencies and to manage the risk of transaction gains and losses associated with assets/liabilities denominated in currencies other than the functional currency of certain subsidiaries (“FX forward contracts”). None of our FX forward contracts are designated as cash flow hedges. We had FX forward contracts with an aggregate notional amount of $8.7 and $6.3 outstanding as of December 31, 2021 and 2020, respectively, with all of the $8.7 scheduled to mature in 2022. The fair value of our FX forward contracts was less than $0.1 at December 31, 2021 and 2020. Commodity Contracts From time to time, we entered into commodity contracts to manage the exposure on forecasted purchases of commodity raw materials. The commodity contracts related solely to Transformer Solutions. As discussed in Note 1, on October 1, 2021, we completed the sale of Transformer Solutions. Immediately prior to the sale, we extinguished the existing commodity contracts and reclassified from AOCI a net loss of $0.6 to “Gain (loss) on disposition of discontinued operations, net of tax” within our consolidated statement of operations for the year ended December 31, 2021. Prior to extinguishment, we designated and accounted for these contracts as cash flow hedges and, to the extent these commodity contracts were effective in offsetting the variability of the forecasted purchases, the change in fair value was included in AOCI. We reclassified amounts associated with our commodity contracts out of AOCI when the forecasted transaction impacted earnings. As of December 31, 2020, the fair values of these contracts was a current asset of $2.4. Since these commodity contracts related to our Transformer Solutions business, the amount has been recorded within assets of discontinued operations in the accompanying consolidated balance sheet. The unrealized gain, net of taxes, recorded in AOCI was $1.5 as of December 31, 2020. Concentrations of Credit Risk Financial instruments that potentially subject us to significant concentrations of credit risk consist of cash and equivalents, trade accounts receivable, insurance recovery assets associated with asbestos product liability matters, and interest rate swap and foreign currency forward contracts. These financial instruments, other than trade accounts receivable, are placed with high-quality financial institutions and insurance companies throughout the world. We periodically evaluate the credit standing of these financial institutions and insurance companies. We maintain cash levels in bank accounts that, at times, may exceed federally-insured limits. We have not experienced significant loss, and believe we are not exposed to significant risk of loss, in these accounts. We have credit loss exposure in the event of nonperformance by counterparties to the above financial instruments, but have no other off-balance-sheet credit risk of accounting loss. We anticipate, however, that counterparties will be able to fully satisfy their obligations under the contracts. We do not obtain collateral or other security to support financial instruments subject to credit risk, but we do monitor the credit standing of counterparties. Concentrations of credit risk arising from trade accounts receivable are due to selling to customers in a particular industry. Credit risks are mitigated by performing ongoing credit evaluations of our customers’ financial conditions and obtaining collateral, advance payments, or other security when appropriate. No one customer, or group of customers that to our knowledge are under common control, accounted for more than 10% of our revenues for any period presented.