Product Warranty and Safety Recall Campaigns (Narrative) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 25, 2016	Mar. 27, 2016	Dec. 31, 2015	Sep. 27, 2015	Mar. 29, 2015	Dec. 31, 2014
Product Information [Line Items]
Liability for recall campaigns	$ 85,523	$ 82,480	$ 74,217	$ 79,808	$ 83,416	$ 69,250
Recall Campaign
Product Information [Line Items]
Liability for recall campaigns	$ 19,500		$ 10,200	$ 16,400
Motorcycles | All Countries, Excluding Japan
Product Information [Line Items]
Standard product warranty, period (in years)	2 years
Motorcycles | Japan
Product Information [Line Items]
Standard product warranty, period (in years)	3 years
Parts and Accessories and General Merchandise
Product Information [Line Items]
Standard product warranty, period (in years)	1 year