Income Taxes - Income Tax Data from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014
Income (loss) components:
United States		$ 87.5			$ 159.3			$ 44.5
International		170.9			223.0			217.5
Income from continuing operations before income tax		258.4			382.3			262.0
Current income tax expense (benefit):
United States - federal		4.3			(8.5)			16.2
United States - state and local		(0.3)			0.1			0.7
International		51.1			52.9			54.6
Total current income tax expense (benefit)		55.1			44.5			71.5
Deferred income tax expense (benefit) components:
United States - federal		26.4			31.9			(0.6)
United States - state and local		(2.1)			6.0			5.1
International		(3.4)			(12.3)			(4.7)
Total deferred income tax expense (benefit)		20.9			25.6			(0.2)
Income tax expense (benefit)		$ 76.0			$ 70.1			$ 71.3
Effective income tax rate	29.40%		29.40%	18.30%		18.30%	27.20%		27.20%