Warranty Reserve Activity (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Product Information [Line Items]
Warranty reserve at January 1,	$ 96.8	$ 98.0
Provision for warranties issued	135.7	148.2
Warranty claims paid	(140.0)	(148.6)
Acquisitions and other adjustments	(2.0)	(0.8)
Warranty reserve at December 31,	90.5	96.8
Other current liabilities			$ 78.0	$ 84.2
Other non-current liabilities			12.5	12.6
Total	$ 96.8	$ 98.0	$ 90.5	$ 96.8