Supplemental Consolidating Data - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Condensed Statement of Income Captions [Line Items]
Net income	$ 375,165	$ 105,745	$ 130,797	$ 115,967	$ 215,406	$ 232,233	$ 611,709	$ 563,605
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(1,642)			63,922			52,019	25,733
Derivative financial instruments	(6,163)			(23,940)			(23,987)	(17,016)
Unrealized gain on available for sale securities	718			0			718	0
Pension and postretirement benefit plans	(776)			(821)			(2,329)	(2,468)
Other comprehensive (loss) income	(7,863)	$ 39,761	$ (5,477)	39,161	$ (5,316)	$ (27,596)	26,421	6,249
Comprehensive income	367,302			155,128			638,130	569,854
Less: Comprehensive loss attributable to noncontrolling interests	2,201			3,073			6,332	8,644
Comprehensive income attributable to Harley-Davidson, Inc.	369,503			158,201			644,462	578,498
Reportable Legal Entities | Non-Financial Services Entities
Condensed Statement of Income Captions [Line Items]
Net income	53,253			59,441			189,601	414,535
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,344			61,961			47,486	27,969
Derivative financial instruments	8,180			(16,148)			(22,104)	(3,810)
Unrealized gain on available for sale securities	0						0
Pension and postretirement benefit plans	(776)			(821)			(2,329)	(2,468)
Other comprehensive (loss) income	8,748			44,992			23,053	21,691
Comprehensive income	62,001			104,433			212,654	436,226
Less: Comprehensive loss attributable to noncontrolling interests	2,201			3,073			6,332	8,644
Comprehensive income attributable to Harley-Davidson, Inc.	64,202			107,506			218,986	444,870
Reportable Legal Entities | Financial Services Entities
Condensed Statement of Income Captions [Line Items]
Net income	321,889			56,504			422,132	149,037
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(2,986)			1,961			4,533	(2,236)
Derivative financial instruments	(14,343)			(7,792)			(1,883)	(13,206)
Unrealized gain on available for sale securities	718						718
Pension and postretirement benefit plans	0			0			0	0
Other comprehensive (loss) income	(16,611)			(5,831)			3,368	(15,442)
Comprehensive income	305,278			50,673			425,500	133,595
Less: Comprehensive loss attributable to noncontrolling interests	0			0			0	0
Comprehensive income attributable to Harley-Davidson, Inc.	305,278			50,673			425,500	133,595
Consolidating Adjustments
Condensed Statement of Income Captions [Line Items]
Net income	23			22			(24)	33
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0			0			0	0
Derivative financial instruments	0			0			0	0
Unrealized gain on available for sale securities	0						0
Pension and postretirement benefit plans	0			0			0	0
Other comprehensive (loss) income	0			0			0	0
Comprehensive income	23			22			(24)	33
Less: Comprehensive loss attributable to noncontrolling interests	0			0			0	0
Comprehensive income attributable to Harley-Davidson, Inc.	$ 23			$ 22			$ (24)	$ 33