Product Warranty And Safety Recall Campaigns (Narrative) (Detail) (USD $) In Millions, unless otherwise specified				6 Months Ended
	Jun. 30, 2013 Safety Recall [Member]	Dec. 31, 2012 Safety Recall [Member]	Jul. 01, 2012 Safety Recall [Member]	Jun. 30, 2013 Motorcycles [Member]	Jun. 30, 2013 Parts and Accessories Finished Goods [Member]	Jun. 30, 2013 Japan [Member] Motorcycles [Member]
Product Information [Line Items]
Standard product warranty, period				2 years	1 year	3 years
Liability for safety recall campaigns	$ 3.0	$ 4.6	$ 6.7