Product Warranty And Safety Recall Campaigns (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 28, 2014 Motorcycles [Member]	Sep. 28, 2014 Parts and Accessories Finished Goods [Member]	Sep. 28, 2014 Japan [Member] Motorcycles [Member]	Sep. 28, 2014 Safety Recall [Member]	Dec. 31, 2013 Safety Recall [Member]	Sep. 29, 2013 Safety Recall [Member]
Product Information [Line Items]
Standard product warranty, period	2 years	1 year	3 years
Liability for safety recall campaigns				$ 15.7	$ 4.0	$ 2.5