Other (expense), net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Intercompany Foreign Currency Balance [Line Items]
Postretirement expense	$ (10.2)	$ (11.9)	$ (203.1)	$ (21.6)
Foreign exchange (losses) gains	(3.2)	(2.6)	0.5	(0.4)
Environmental costs and other, net	(3.3)	(7.4)	(11.0)	(20.9)
Total other (expense), net	(16.7)	(21.9)	(213.6)	(42.9)
Liquidation of Foreign Subsidiaries
Intercompany Foreign Currency Balance [Line Items]
Foreign exchange (losses) gains	$ (0.1)	$ (1.8)	3.4	(2.9)
Pension Plans
Intercompany Foreign Currency Balance [Line Items]
Settlement losses to defined benefit pension plans			$ 183.2	$ 0.0