Accumulated Other Comprehensive Income (Loss) - Changes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 9,071.2	$ 9,189.5
Other comprehensive loss	(29.3)	(99.7)
Balance at end of period	9,063.3	9,025.7
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(41.6)	14.2
Other comprehensive loss before reclassifications	(29.3)	(99.6)
Amounts reclassified from accumulated other comprehensive income (loss)	(0.6)	1.0
Other comprehensive loss	(29.9)	(98.6)
Balance at end of period	(71.5)	(84.4)
Foreign Currency Translation Adjustments, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(29.9)	74.6
Other comprehensive loss before reclassifications	(28.8)	(99.8)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Other comprehensive loss	(28.8)	(99.8)
Balance at end of period	(58.7)	(25.2)
Pension and Other Postretirement Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(11.7)	(60.4)
Other comprehensive loss before reclassifications	(0.5)	0.2
Amounts reclassified from accumulated other comprehensive income (loss)	(0.6)	1.0
Other comprehensive loss	(1.1)	1.2
Balance at end of period	$ (12.8)	$ (59.2)