Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Before Income Taxes [Abstract]
United States	$ 144.1	$ 190.7	$ 202.0
Non-United States	252.2	281.7	206.1
Income Before Income Taxes	396.3	472.4	408.1
Current:
Federal	40.3	20.8	46.1
State and local	7.9	4.8	9.9
Foreign	78.9	81.0	68.0
Total current income tax expense (benefit)	127.1	106.6	124.0
Deferred:
Federal	(19.5)	39.8	(19.9)
State and local	(1.3)	6.5	(0.7)
Foreign	(2.4)	(55.2)	(0.8)
Deferred income tax provision	(23.2)	(8.9)	(21.4)
United States and foreign tax provision on income	$ 103.9	$ 97.7	$ 102.6