Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	$ (1,437.9)	$ (1,252.3)
Other comprehensive income (loss) before reclassifications	(25.6)	(489.7)
Reclassification from accumulated other comprehensive income (loss)	5.0	7.5
September 30	(1,458.5)	(1,734.5)
Cash Flow Hedge
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(12.1)	(16.1)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from accumulated other comprehensive income (loss)	3.0	3.0
September 30	(9.1)	(13.1)
Defined Benefit Pension Plans and Postemployment Arrangements
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(41.3)	(90.4)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Reclassification from accumulated other comprehensive income (loss)	2.0	4.5
September 30	(39.3)	(85.9)
Foreign Currency Translation
Changes in Accumulated Other Comprehensive Income (Loss)
January 1	(1,384.5)	(1,145.8)
Other comprehensive income (loss) before reclassifications	(25.6)	(489.7)
Reclassification from accumulated other comprehensive income (loss)	0.0	0.0
September 30	$ (1,410.1)	$ (1,635.5)