Supplemental Consolidating Data - Schedule of Operations (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
Revenue:
Motorcycles and related products	$ 1,079,522			$ 881,213			$ 3,213,431	$ 3,717,375
Financial services	261,188			269,482			763,587	781,818
Total revenue	1,340,710			1,150,695			3,977,018	4,499,193
Costs and expenses:
Motorcycles and related products cost of goods sold	798,683			618,580			2,320,261	2,566,272
Financial services interest expense	75,883			94,463			258,391	276,943
Credit Losses	(301,499)			57,977			(198,427)	175,017
Selling, administrative and engineering expense	292,885			273,879			849,098	870,985
Total costs and expenses	865,952			1,044,899			3,229,323	3,889,217
Operating income	474,758			105,796			747,695	609,976
Other income, net	14,706			18,408			45,456	54,851
Investment income	12,267			16,450			32,158	45,665
Interest expense	10,182			7,707			25,564	23,066
Income before income taxes	491,549			132,947			799,745	687,426
Income tax provision	116,384			16,980			188,036	123,821
Net income	375,165	$ 105,745	$ 130,797	115,967	$ 215,406	$ 232,233	611,709	563,605
Less: (income) loss attributable to noncontrolling interests	2,201			3,073			6,332	8,644
Net income attributable to Harley-Davidson, Inc.	377,366			119,040			618,041	572,249
Reportable Legal Entities | Non-Financial Services Entities
Revenue:
Motorcycles and related products	1,095,322			883,958			3,234,041	3,724,668
Financial services	0			0			0	0
Total revenue	1,095,322			883,958			3,234,041	3,724,668
Costs and expenses:
Motorcycles and related products cost of goods sold	798,683			618,580			2,320,261	2,566,272
Financial services interest expense	0			0			0	0
Credit Losses	0			0			0	0
Selling, administrative and engineering expense	245,425			234,002			720,733	744,663
Total costs and expenses	1,044,108			852,582			3,040,994	3,310,935
Operating income	51,214			31,376			193,047	413,733
Other income, net	14,706			18,408			45,456	54,851
Investment income	12,267			16,450			32,158	45,665
Interest expense	10,182			7,707			25,564	23,066
Income before income taxes	68,005			58,527			245,097	491,183
Income tax provision	14,752			(914)			55,496	76,648
Net income	53,253			59,441			189,601	414,535
Less: (income) loss attributable to noncontrolling interests	2,201			3,073			6,332	8,644
Net income attributable to Harley-Davidson, Inc.	55,454			62,514			195,933	423,179
Reportable Legal Entities | Financial Services Entities
Revenue:
Motorcycles and related products	0			0			0	0
Financial services	261,687			269,880			766,238	783,339
Total revenue	261,687			269,880			766,238	783,339
Costs and expenses:
Motorcycles and related products cost of goods sold	0			0			0	0
Financial services interest expense	75,883			94,463			258,391	276,943
Credit Losses	(301,499)			57,977			(198,427)	175,017
Selling, administrative and engineering expense	63,782			43,042			151,602	135,169
Total costs and expenses	(161,834)			195,482			211,566	587,129
Operating income	423,521			74,398			554,672	196,210
Other income, net	0			0			0	0
Investment income	0			0			0	0
Interest expense	0			0			0	0
Income before income taxes	423,521			74,398			554,672	196,210
Income tax provision	101,632			17,894			132,540	47,173
Net income	321,889			56,504			422,132	149,037
Less: (income) loss attributable to noncontrolling interests	0			0			0	0
Net income attributable to Harley-Davidson, Inc.	321,889			56,504			422,132	149,037
Consolidating Adjustments
Revenue:
Motorcycles and related products	(15,800)			(2,745)			(20,610)	(7,293)
Financial services	(499)			(398)			(2,651)	(1,521)
Total revenue	(16,299)			(3,143)			(23,261)	(8,814)
Costs and expenses:
Motorcycles and related products cost of goods sold	0			0			0	0
Financial services interest expense	0			0			0	0
Credit Losses	0			0			0	0
Selling, administrative and engineering expense	(16,322)			(3,165)			(23,237)	(8,847)
Total costs and expenses	(16,322)			(3,165)			(23,237)	(8,847)
Operating income	23			22			(24)	33
Other income, net	0			0			0	0
Investment income	0			0			0	0
Interest expense	0			0			0	0
Income before income taxes	23			22			(24)	33
Income tax provision	0			0			0	0
Net income	23			22			(24)	33
Less: (income) loss attributable to noncontrolling interests	0			0			0	0
Net income attributable to Harley-Davidson, Inc.	$ 23			$ 22			$ (24)	$ 33