Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current provision:
Federal	$ 521.8	$ 482.4	$ 191.4
State	61.1	59.0	20.9
Foreign	205.4	215.4	214.1
Current Income Tax Expense (Benefit), Total	788.3	756.8	426.4
Deferred (benefit) provision:
Federal	(57.8)	(88.3)	68.8
State	5.3	0.3	18.4
Foreign	(2.7)	(10.0)	10.1
Deferred taxes	(55.2)	(98.0)	97.3
Income taxes	$ 733.1	$ 658.8	$ 523.7