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Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes
Current, Federal	$ 148.0	$ 71.6	$ 82.9
Current, State	9.4	14.5	13.9
Current, International	43.8	34.9	23.6
Deferred, Federal	23.5	11.0	(4.2)
Deferred, State	5.8	5.2	2.2
Deferred, International	(6.2)	(1.2)	1.2
Provision for income taxes	$ 224.3	$ 136.0	$ 119.6

X

- Definition

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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