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Other (expense), net
 12 Months Ended
Dec. 31, 2021
Other Income and Expenses [Abstract]  
Other (expense), net Other (expense), net
Other (expense), net is comprised of the following:
Year ended December 31,202120202019
Postretirement expense*$(548.6)$(235.9)$(93.3)
Debt extinguishment charge— (28.5)(20.1)
Foreign exchange losses**(2.5)(36.2)(10.4)
Environmental costs and other, net(29.2)(29.0)(12.6)
Total other (expense), net$(580.3)$(329.6)$(136.4)
*Includes $499.4 million of settlement losses in 2021 related to the company’s defined benefit pension plans and $142.1 million settlement loss in 2020 related to the U.S. defined benefit pension plans. See Note 18, “Employee plans.”
**Includes charges of $4.0 million and $32.3 million, respectively, in 2021 and 2020 for net foreign currency losses related to substantial completion of liquidation of foreign subsidiaries.