Components of Consolidated Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current Tax Provision:
Federal	$ 495.8	$ 489.8	$ 291.5
State	65.3	64.5	47.2
Non-U.S.	99.3	83.1	76.1
Total	660.4	637.4	414.8
Deferred Tax Provision:
Federal	(159.0)	(131.1)	(31.1)
State	(18.9)	(13.6)	(1.6)
Non-U.S.	2.1	(1.5)	(3.7)
Total	(175.8)	(146.2)	(36.4)
Provision for Income Taxes	$ 484.6	$ 491.2	$ 378.4