Income Taxes - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 5.2	$ 16.7	$ 17.2
State	4.5	2.5	10.8
Non-United States	124.6	243.6	181.9
Total current	134.3	262.8	209.9
Deferred
Federal	(11.0)	(22.1)	(7.5)
State	(4.9)	1.1	1.0
Non-United States	5.5	(22.0)	(5.4)
Total deferred	(10.4)	(43.0)	(11.9)
Total provision	$ 123.9	$ 219.8	$ 198.0