Derivative Financial Instruments and Hedging Activities - Schedule of Amount of Gains and Losses Recognized in Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Derivative
Motorcycles and related products cost of goods sold	$ 701,453	$ 798,683	$ 2,304,903	$ 2,320,261
Selling, administrative and engineering expense	291,313	292,885	890,672	849,098
Interest expense	3,629	10,182	10,820	25,564
Financial services interest expense	32,245	75,883	102,105	258,391
Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	(4,803)	(4,435)	(30,226)	155,044
Foreign currency contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	1,455	(6,293)	(1,668)	2,855
Foreign currency contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivative
Gain/(loss) reclassified from AOCL into income:	1,455	(6,293)	(1,668)	2,855
Commodity contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	(51)	(39)	(1)	19
Commodity contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
Derivative
Gain/(loss) reclassified from AOCL into income:	(51)	(39)	(1)	19
Cross-currency swaps \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	(6,097)	2,227	(28,087)	153,216
Cross-currency swaps \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Derivative
Gain/(loss) reclassified from AOCL into income:	(6,097)	2,227	(28,087)	153,216
Treasury rate lock contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	(110)	(181)	(329)	(603)
Treasury rate lock contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:FinancingInterestExpense
Derivative
Gain/(loss) reclassified from AOCL into income:	(63)	(120)	(189)	(360)
Treasury rate lock contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
Derivative
Gain/(loss) reclassified from AOCL into income:	(47)	(61)	(140)	(243)
Swap rate lock contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments
Derivative
Gain/(loss) reclassified from AOCL into income:	0	(149)	(141)	(443)
Swap rate lock contracts \| Cash Flow Hedging \| Derivative Financial Instruments Designated as Cash Flow Hedging Instruments \| Income Statement Location [Axis]: us-gaap:FinancingInterestExpense
Derivative
Gain/(loss) reclassified from AOCL into income:	$ 0	$ (149)	$ (141)	$ (443)

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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