Finance Receivables (Changes In Allowance For Credit Losses On Finance Receivables) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 156,184	$ 132,820	$ 147,178	$ 127,364
Provision for credit losses	23,461	15,175	60,584	41,422
Charge-offs	(26,460)	(21,003)	(66,104)	(53,736)
Recoveries	11,459	12,239	22,986	24,181
Other	(3,291)		(3,291)
Balance, end of period	161,353	139,231	161,353	139,231
Current unpaid balance - off-balance sheet retail motorcycle finance receivables	292,176	0	292,176	0	$ 0
Current unpaid balance - on-balance sheet retail motorcycle finance receivables	5,872,668	5,799,682	5,872,668	5,799,682	$ 5,843,352
Variable Interest Entity, Not Primary Beneficiary | Term asset-backed securitization debt
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Principal balance of finance receivable	301,800		301,800
Retail
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	146,727	123,777	139,320	122,025
Provision for credit losses	24,563	16,890	60,087	39,433
Charge-offs	(26,460)	(21,003)	(66,104)	(53,736)
Recoveries	11,459	12,239	22,986	24,181
Other	(3,291)		(3,291)
Balance, end of period	152,998	131,903	152,998	131,903
Wholesale
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	9,457	9,043	7,858	5,339
Provision for credit losses	(1,102)	(1,715)	497	1,989
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Other	0		0
Balance, end of period	$ 8,355	$ 7,328	$ 8,355	$ 7,328