Product Warranty and Recall Campaigns (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 31, 2018
Product Information
Liability for recall campaigns	$ 64,100	$ 32,300	$ 73,300
Supplier recoveries	$ 19,617	$ 16,638
Motorcycles | All Countries, Excluding Japan
Product Information
Standard product warranty, period (in years)	2 years
Motorcycles | Japan
Product Information
Standard product warranty, period (in years)	3 years
Parts and Accessories and General Merchandise
Product Information
Standard product warranty, period (in years)	1 year
Operating Expense
Product Information
Supplier recoveries	$ 28,000