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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Amount of cost (reversal of cost) for other postretirement benefits. Excludes pension benefits.

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Other (expense), net (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
Other (expense), net (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2020	Jun. 30, 2020	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intercompany Foreign Currency Balance [Line Items]
Postretirement expense					$ (235.9)	$ (93.3)	$ (80.3)
Debt extinguishment charge			$ (28.5)	$ (20.1)	(28.5)	(20.1)	0.0
Foreign exchange losses					(36.2)	(10.4)	(5.9)
Environmental costs and other, net					(29.0)	(12.6)	9.1
Other (expense), net					(329.6)	(136.4)	(77.1)
Non-cash pension settlement charge		$ 142.1
Pension Plans \| United States
Intercompany Foreign Currency Balance [Line Items]
Non-cash pension settlement charge	$ 142.1				142.1	$ 0.0	$ 0.0
Liquidation of Foreign Subsidiaries
Intercompany Foreign Currency Balance [Line Items]
Foreign exchange losses					$ (32.3)