Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	$ 4,193.5
September 30	4,613.3
Cash Flow Hedge
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(5.0)	$ (8.1)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	2.8	2.8
September 30	(2.2)	(5.3)
Defined Benefit Pension Plans and Postemployment Arrangements
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(25.5)	(42.7)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	1.4	1.1
September 30	(24.1)	(41.6)
Foreign Currency Translation
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1,445.4)	(1,286.8)
Other comprehensive income (loss) before reclassifications	144.6	59.4
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	0.0	0.0
September 30	(1,300.8)	(1,227.4)
Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1,475.9)	(1,337.6)
Other comprehensive income (loss) before reclassifications	144.6	59.4
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	4.2	3.9
September 30	$ (1,327.1)	$ (1,274.3)