Asset-Backed Financing (Narrative) (Detail)	1 Months Ended
	Dec. 31, 2017 USD ($)	Jun. 30, 2017 CAD ($)	Jul. 01, 2018 USD ($)	Jun. 25, 2017 USD ($)	Jun. 26, 2016 USD ($)
Variable Interest Entity [Line Items]
Company issued secured notes, net of discount and issuance costs	$ 5,714,527,000		$ 5,813,809,000	$ 6,243,908,000
Current unpaid balance - off-balance sheet retail motorcycle finance receivables	146,425,000		109,578,000	187,769,000
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Principal balance of finance receivable					$ 301,800,000
Secured Debt
Variable Interest Entity [Line Items]
Company issued secured notes, net of discount and issuance costs	806,860,000		636,068,000	$ 939,872,000
Secured Debt | Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] | SPEs | U.S. Line of Credit
Variable Interest Entity [Line Items]
Line of credit, maximum borrowing capacity	$ 900,000,000
Debt instrument, term	5 years
Secured Debt | Asset-Backed U.S. Commercial Paper Conduit Facility VIE, Facility Two [Member] | SPEs | U.S. Line of Credit
Variable Interest Entity [Line Items]
Line of credit, maximum borrowing capacity	$ 300,000,000.0
Secured Debt | Asset-Backed U.S. Commercial Paper Conduit Facility VIE, Facility One [Member] | SPEs | U.S. Line of Credit
Variable Interest Entity [Line Items]
Line of credit, maximum borrowing capacity	$ 600,000,000.0
Secured Debt | Asset-backed Canadian commercial paper conduit facility | Variable Interest Entity, Not Primary Beneficiary | Foreign Line of Credit
Variable Interest Entity [Line Items]
Line of credit, maximum borrowing capacity		$ 220,000,000
Debt instrument, term		5 years
VIE, maximum loss exposure, amount			$ 34,400,000