Finance Receivables (Changes In Allowance For Credit Losses On Finance Receivables) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 25, 2017	Jun. 26, 2016	Jun. 25, 2017	Jun. 26, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 184,030	$ 156,184	$ 173,343	$ 147,178
Provision for credit losses	26,217	23,461	69,806	60,584
Charge-offs	(30,374)	(26,460)	(76,298)	(66,104)
Recoveries	13,655	11,459	26,677	22,986
Other		(3,291)		(3,291)
Balance, end of period	193,528	161,353	193,528	161,353
Current unpaid balance - off-balance sheet retail motorcycle finance receivables	187,769	292,176	187,769	292,176	$ 236,706
Current unpaid balance - on-balance sheet retail motorcycle finance receivables	6,121,372	5,872,668	6,121,372	5,872,668	$ 5,839,467
Variable Interest Entity, Not Primary Beneficiary
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Principal balance of finance receivable		301,800		301,800
Variable Interest Entity, Not Primary Beneficiary \| 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	176,068	146,727	166,810	139,320
Provision for credit losses	26,550	24,563	68,710	60,087
Charge-offs	(30,374)	(26,460)	(76,298)	(66,104)
Recoveries	13,655	11,459	26,677	22,986
Other		(3,291)		(3,291)
Balance, end of period	185,899	152,998	185,899	152,998
Wholesale
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	7,962	9,457	6,533	7,858
Provision for credit losses	(333)	(1,102)	1,096	497
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Other		0		0
Balance, end of period	$ 7,629	$ 8,355	$ 7,629	$ 8,355

Financing Receivable, Allowance for Credit Losses, Other

No definition available.

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- Definition

Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=d3e107314-111719

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- Definition

Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=d3e107314-111719

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

+ Details

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Amount of direct write-downs of financing receivables charged against the allowance.

+ References

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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- Definition

Amount of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction, at the date of derecognition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=SL51823488-111719

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