Goodwill And Intangible Assets (Changes To Intangible Assets) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Balance at beginning of period, net of accumulated amortization	$ 317.1	$ 353.5
Amortization expense	(7.7)	(31.5)
Currency translation and other	(4.9)	4.9
Balance at end of period, net of accumulated amortization	$ 314.3	$ 317.1