Product Warranty And Safety Recall Campaigns (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2016	Dec. 31, 2015	Mar. 29, 2015
Motorcycles [Member]
Product Information [Line Items]
Standard product warranty, period	2 years
Parts and Accessories Finished Goods [Member]
Product Information [Line Items]
Standard product warranty, period	1 year
Japan [Member] | Motorcycles [Member]
Product Information [Line Items]
Standard product warranty, period	3 years
Safety Recall [Member]
Product Information [Line Items]
Liability for safety recall campaigns	$ 7.1	$ 10.2	$ 7.7