Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 453.8	$ 292.9	$ 278.2
State and Local	30.0	39.5	40.1
Non-U.S.	207.0	102.9	93.6
Total current	690.8	435.3	411.9
Deferred:
Federal	155.5	(125.8)	14.7
State and Local	17.5	(20.3)	7.6
Non-U.S.	(84.7)	(7.0)	(4.2)
Total deferred	88.3	(153.1)	18.1
Total provision for income taxes	$ 779.1	$ 282.2	$ 430.0