Supplemental Consolidating Data - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Condensed Statement of Income Captions [Line Items]
Net income	$ 105,745	$ 130,797	$ 215,406	$ 232,233	$ 236,542	$ 447,639
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	46,296		(6,895)		53,661	(38,189)
Derivative financial instruments	(5,759)		2,403		(17,824)	6,924
Pension and postretirement benefit plans	(776)		(824)		(1,553)	(1,647)
Other comprehensive income (loss)	39,761	$ (5,477)	(5,316)	$ (27,596)	34,284	(32,912)
Comprehensive income	145,506		210,090		270,826	414,727
Less: Comprehensive loss attributable to noncontrolling interests	1,824		2,863		4,131	5,571
Comprehensive income attributable to Harley-Davidson, Inc.	147,330		212,953		274,957	420,298
Reportable Legal Entities | Non-Financial Services Entities
Condensed Statement of Income Captions [Line Items]
Net income	53,807		162,731		136,346	355,095
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	39,941		(5,607)		46,142	(33,992)
Derivative financial instruments	(21,234)		2,756		(30,284)	12,338
Pension and postretirement benefit plans	(776)		(824)		(1,553)	(1,647)
Other comprehensive income (loss)	17,931		(3,675)		14,305	(23,301)
Comprehensive income	71,738		159,056		150,651	331,794
Less: Comprehensive loss attributable to noncontrolling interests	1,824		2,863		4,131	5,571
Comprehensive income attributable to Harley-Davidson, Inc.	73,562		161,919		154,782	337,365
Reportable Legal Entities | Financial Services Entities
Condensed Statement of Income Captions [Line Items]
Net income	52,192		52,771		100,243	92,533
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	6,355		(1,288)		7,519	(4,197)
Derivative financial instruments	15,475		(353)		12,460	(5,414)
Pension and postretirement benefit plans	0		0		0	0
Other comprehensive income (loss)	21,830		(1,641)		19,979	(9,611)
Comprehensive income	74,022		51,130		120,222	82,922
Less: Comprehensive loss attributable to noncontrolling interests	0		0		0	0
Comprehensive income attributable to Harley-Davidson, Inc.	74,022		51,130		120,222	82,922
Consolidating Adjustments
Condensed Statement of Income Captions [Line Items]
Net income	(254)		(96)		(47)	11
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0		0		0	0
Derivative financial instruments	0		0		0	0
Pension and postretirement benefit plans	0		0		0	0
Other comprehensive income (loss)	0		0		0	0
Comprehensive income	(254)		(96)		(47)	11
Less: Comprehensive loss attributable to noncontrolling interests	0		0		0	0
Comprehensive income attributable to Harley-Davidson, Inc.	$ (254)		$ (96)		$ (47)	$ 11