Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current Tax Provision:
Federal	$ 216.4	$ 132.8	$ 347.3
State	50.7	95.4	38.3
Non-U.S.	150.5	162.7	125.4
Total	417.6	390.9	511.0
Deferred Tax Provision:
Federal	16.5	33.8	(96.4)
State	16.5	(13.8)	24.6
Non-U.S.	1.3	(9.5)	(4.3)
Total	34.3	10.5	(76.1)
Provision for Income Taxes	$ 451.9	$ 401.4	$ 434.9