Goodwill And Intangible Assets (Changes To Goodwill) (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Balance at beginning of period	$ 1,167.9	$ 1,193.3
Currency translation and other	7.7	(23.4)
Balance at end of period	$ 1,175.6	$ 1,167.9