Components of Consolidated Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current Tax Provision:
Federal	$ 489.8	$ 291.5	$ 185.6
State	64.5	47.2	24.6
Non-U.S.	83.1	76.1	67.4
Total	637.4	414.8	277.6
Deferred Tax Provision:
Federal	(131.1)	(31.1)	53.9
State	(13.6)	(1.6)	14.1
Non-U.S.	(1.5)	(3.7)	(1.4)
Total	(146.2)	(36.4)	66.6
Provision for Income Taxes	$ 491.2	$ 378.4	$ 344.2