Incentive Tax Grant (Detail) - Malaysian and Puerto Rican - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	[1]	Dec. 31, 2014	[1]
Income Taxes [Line Items]
Tax benefit	$ 92.2	$ 2.3		$ 7.0
Per share benefit	$ 1.23	$ 0.03		$ 0.09

[1] Litigation charges, net, reduced the tax benefit recognized from the incentive tax grant in Puerto Rico.