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Other (expense), net
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Other (expense), net Other (expense), net
Other (expense), net is comprised of the following:
Year ended December 31,202320222021
Postretirement expense*$(387.1)$(43.2)$(548.6)
Foreign exchange losses**(0.2)(6.8)(2.5)
Environmental costs and other, net***(6.6)(32.4)(29.2)
Total other (expense), net$(393.9)$(82.4)$(580.3)
*Includes $348.9 million of settlement losses in 2023 and $499.4 million of settlement losses in 2021 related to the company’s defined benefit pension plans. See Note 17, “Employee plans.”
**Includes (credits) charges of $(3.7) million, $2.9 million and $4.0 million respectively, in 2023, 2022 and 2021 for net foreign currency (gains) losses related to substantial completion of liquidation of foreign subsidiaries.
***Environmental costs relate to previously disposed businesses.