Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	$ 12,045.8
March 31	9,437.1
Cash Flow Hedge
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1.3)	$ (5.0)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	0.9	1.0
March 31	(0.4)	(4.0)
Defined Benefit Pension Plans and Postemployment Arrangements
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(40.2)	(25.5)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	3.5	0.4
March 31	(36.7)	(25.1)
Foreign Currency Translation
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1,224.3)	(1,445.4)
Other comprehensive income (loss) before reclassifications	(52.5)	78.7
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	0.0	0.0
March 31	(1,276.8)	(1,366.7)
Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1,265.8)	(1,475.9)
Other comprehensive income (loss) before reclassifications	(52.5)	78.7
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	4.4	1.4
March 31	$ (1,313.9)	$ (1,395.8)