Fair Value - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025
Assets:
Fair value of debt securities, AFS	$ 46,564	$ 78,286	$ 92,290
Retained Notes
Assets:
Fair value of debt securities, AFS	39,001	68,130	80,204
Residual Interests
Assets:
Fair value of debt securities, AFS	7,563	10,156	12,086
Fair Value, Measurements, Recurring
Assets:
Cash equivalents	1,731,587	2,693,739	1,474,496
Marketable securities	26,781	31,513	32,493
Derivative financial instruments	40,482	108,435	116,748
Assets, fair value	1,845,414	2,911,973	1,716,027
Liabilities:
Derivative financial instruments	678	6,494	7,447
LiveWire warrants	1,108	1,901	2,204
Liabilities, fair value disclosure	1,786	8,395	9,651
Fair Value, Measurements, Recurring \| Retained Notes
Assets:
Fair value of debt securities, AFS	39,001	68,130	80,204
Fair Value, Measurements, Recurring \| Residual Interests
Assets:
Fair value of debt securities, AFS	7,563	10,156	12,086
Fair Value, Measurements, Recurring \| Level 1
Assets:
Cash equivalents	1,656,800	2,553,850	1,244,794
Marketable securities	26,781	31,513	32,493
Derivative financial instruments	0	0	0
Assets, fair value	1,683,581	2,585,363	1,277,287
Liabilities:
Derivative financial instruments	0	0	0
LiveWire warrants	725	1,244	1,442
Liabilities, fair value disclosure	725	1,244	1,442
Fair Value, Measurements, Recurring \| Level 1 \| Retained Notes
Assets:
Fair value of debt securities, AFS	0	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Residual Interests
Assets:
Fair value of debt securities, AFS	0	0	0
Fair Value, Measurements, Recurring \| Level 2
Assets:
Cash equivalents	74,787	139,889	229,702
Marketable securities	0	0	0
Derivative financial instruments	40,482	108,435	116,748
Assets, fair value	154,270	316,454	426,654
Liabilities:
Derivative financial instruments	678	6,494	7,447
LiveWire warrants	383	657	762
Liabilities, fair value disclosure	1,061	7,151	8,209
Fair Value, Measurements, Recurring \| Level 2 \| Retained Notes
Assets:
Fair value of debt securities, AFS	39,001	68,130	80,204
Fair Value, Measurements, Recurring \| Level 2 \| Residual Interests
Assets:
Fair value of debt securities, AFS	0	0	0
Fair Value, Measurements, Recurring \| Level 3
Assets:
Cash equivalents	0	0	0
Marketable securities	0	0	0
Derivative financial instruments	0	0	0
Assets, fair value	7,563	10,156	12,086
Liabilities:
Derivative financial instruments	0	0	0
LiveWire warrants	0	0	0
Liabilities, fair value disclosure	0	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Retained Notes
Assets:
Fair value of debt securities, AFS	0	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Residual Interests
Assets:
Fair value of debt securities, AFS	$ 7,563	$ 10,156	$ 12,086

Deferred Compensation Assets, Fair Value Disclosure

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Warrant, Liability

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- Definition

Fair value portion of asset recognized for present right to economic benefit.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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