Business Segments And Geographic Information (Information By Strategic Business Units) (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 28, 2014		Jun. 29, 2014		Mar. 30, 2014		Dec. 31, 2013		Sep. 29, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of Operating Segments																	2
Motorcycles net revenue	$ 1,031,200,000		$ 1,130,600,000		$ 1,834,300,000		$ 1,571,700,000		$ 1,032,300,000		$ 1,180,300,000		$ 1,631,500,000		$ 1,414,200,000		$ 5,567,681,000	[1]	$ 5,258,290,000	[1]	$ 4,942,582,000	[1]
Selling, administrative and engineering expense																	1,159,502,000		1,126,884,000		1,111,232,000
Restructuring expense																	0		(2,131,000)		28,475,000
Financial services revenue	169,000,000		171,000,000		166,400,000		154,400,000		158,300,000		163,400,000		162,800,000		157,000,000		660,827,000	[1]	641,582,000	[1]	637,924,000	[1]
Operating income																	1,280,983,000		1,153,702,000		1,000,176,000
Interest Income Paid By Motorcycles Segment																	8,100,000		10,400,000		11,500,000
Motorcycles Segment [Member]
Segment Reporting Information [Line Items]
Motorcycles net revenue																	5,567,681,000		5,258,290,000		4,942,582,000
Gross profit																	2,025,080,000		1,862,372,000		1,720,188,000
Selling, administrative and engineering expense																	1,021,933,000		993,894,000		976,224,000
Restructuring expense																	0		(2,131,000)		28,475,000
Operating income	35,900,000	[2]	146,300,000	[2]	473,300,000	[2]	347,700,000	[2]	60,700,000	[2]	175,500,000	[2]	357,700,000	[2]	276,800,000	[2]	1,003,147,000		870,609,000		715,489,000
Financial Services Segment [Member]
Segment Reporting Information [Line Items]
Financial services revenue																	660,827,000		641,582,000		637,924,000
Financial Services Costs																	382,991,000		358,489,000		353,237,000
Operating income	$ 62,400,000		$ 77,800,000		$ 74,400,000		$ 63,200,000		$ 61,300,000		$ 76,100,000		$ 74,200,000		$ 71,500,000		$ 277,836,000		$ 283,093,000		$ 284,687,000

[1] Revenue is attributed to geographic regions based on location of customer.

[2] Operating income for the Motorcycles segment includes restructuring expense (benefit) as discussed in Note 3 for the following periods (in millions): 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Mar 30,2014 Mar 31,2013 June 29,2014 June 30,2013 Sep 28,2014 Sep 29,2013 Dec 31,2014 Dec 31,2013Restructuring expense (benefit) $— $2.9 $— $(5.3) $— $0.6 $— $(0.4)