Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current provision:
Federal	$ 352.3	$ 267.1	$ 397.7
State	96.8	67.5	63.8
Foreign	191.4	263.0	210.5
Current Income Tax Expense (Benefit), Total	640.5	597.6	672.0
Deferred provision (benefit):
Federal	40.7	22.6	(173.8)
State	(4.3)	1.3	2.3
Foreign	34.4	(6.4)	(2.4)
Deferred taxes	70.8	17.5	(173.9)
Income taxes	$ 711.3	$ 615.1	$ 498.1