Other (expense), net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Intercompany Foreign Currency Balance [Line Items]
Pension and postretirement expense	$ (183.0)	$ (242.5)	$ (243.1)	$ (285.6)
(Loss) gain on debt extinguishment	0.0	(0.2)	0.2	(7.0)
Foreign exchange (losses) gains	5.8	(3.7)	10.1	(1.4)
Interest income	2.7	4.7	12.0	16.0
Other, net	(8.7)	0.5	(11.8)	(2.2)
Total other (expense), net	(183.2)	(241.2)	(232.6)	(280.2)
Tax adjustments and settlements	7.0		7.0
Pension Plans
Intercompany Foreign Currency Balance [Line Items]
Settlement losses to defined benefit pension plans	151.2	227.7	151.2	227.7
United States \| Pension Plans
Intercompany Foreign Currency Balance [Line Items]
Settlement losses to defined benefit pension plans	$ 151.2	$ 227.7	$ 151.2	$ 227.7

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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