Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 155.4	$ 316.0	$ 239.2
State	56.2	29.8	21.8
Foreign	105.1	89.9	54.9
Deferred:
Federal	(24.2)	(358.3)	(26.8)
State	(25.8)	(3.7)	0.2
Foreign	(12.7)	(10.8)	(7.3)
Total	$ 254.0	$ 62.9	$ 282.0