Supplemental Consolidating Data - Schedule of Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 1,775,038			$ 1,589,608	$ 2,243,910
Accounts receivable, net	305,010			234,315	307,701
Finance receivables held for sale, net	4,080,885			0	0
Finance receivables held for investment, net	1,221,348			2,031,496	2,300,551
Inventories, net	512,186			745,793	681,864
Restricted cash	51,530			135,661	147,910
Other current assets	297,444			259,764	208,000
Current assets	8,243,441			4,996,637	5,889,936
Finance receivables held for investment, net	662,201			5,256,798	5,499,836
Property, plant and equipment, net	719,103			757,072	728,467
Pension and postretirement assets	481,427			440,825	452,515
Goodwill	63,850			61,655	62,909
Deferred income taxes	90,837			175,826	169,290
Lease assets	67,290			63,853	69,837
Other long-term assets	238,235			128,913	153,869
Assets	10,566,384			11,881,579	13,026,659
Current liabilities:
Accounts payable	342,787			298,718	305,619
Accrued liabilities	628,624			593,960	626,352
Short-term deposits, net	292,667			173,099	178,638
Short-term debt	684,741			640,204	497,373
Current portion of long-term debt, net	1,329,244			1,851,513	2,561,535
Current liabilities	3,278,063			3,557,494	4,169,517
Long-term deposits, net	261,801			377,487	370,372
Long-term debt, net	3,147,836			4,468,665	4,739,507
Lease liabilities	52,487			47,420	51,955
Pension and postretirement liabilities	51,141			53,874	58,551
Deferred income taxes	17,655			16,889	33,493
Other long-term liabilities	196,022			201,250	178,152
Commitments and contingencies (Note 14)
Total equity	3,561,379	$ 3,307,933	$ 3,173,690	3,158,500	3,425,112	$ 3,433,316	$ 3,336,086	$ 3,252,295
Total liabilities and shareholders' equity	10,566,384			11,881,579	13,026,659
Reportable Legal Entities | Non-Financial Services Entities
Current assets:
Cash and cash equivalents	1,185,181			1,105,663	1,213,301
Accounts receivable, net	506,057			294,776	498,694
Finance receivables held for sale, net	0
Finance receivables held for investment, net	0			0	0
Inventories, net	512,186			745,793	681,864
Restricted cash	0			0	0
Other current assets	188,319			273,791	167,555
Current assets	2,391,743			2,420,023	2,561,414
Finance receivables held for investment, net	0			0	0
Property, plant and equipment, net	712,722			743,875	713,603
Pension and postretirement assets	481,427			440,825	452,515
Goodwill	63,850			61,655	62,909
Deferred income taxes	88,381			88,734	77,990
Lease assets	64,678			60,628	66,304
Other long-term assets	221,289			221,694	223,749
Assets	4,024,090			4,037,434	4,158,484
Current liabilities:
Accounts payable	315,728			275,314	283,296
Accrued liabilities	481,314			515,830	491,697
Short-term deposits, net	0			0	0
Short-term debt	0			0	0
Current portion of long-term debt, net	0			449,831	449,759
Current liabilities	797,042			1,240,975	1,224,752
Long-term deposits, net	0			0	0
Long-term debt, net	745,508			296,969	296,859
Lease liabilities	50,309			44,520	48,821
Pension and postretirement liabilities	51,141			53,874	58,551
Deferred income taxes	15,789			15,765	30,266
Other long-term liabilities	140,940			139,373	147,563
Commitments and contingencies (Note 14)
Total equity	2,223,361			2,245,958	2,351,672
Total liabilities and shareholders' equity	4,024,090			4,037,434	4,158,484
Reportable Legal Entities | Financial Services Entities
Current assets:
Cash and cash equivalents	589,857			483,945	1,030,609
Accounts receivable, net	142			65	60
Finance receivables held for sale, net	4,080,885
Finance receivables held for investment, net	1,221,348			2,031,496	2,300,551
Inventories, net	0			0	0
Restricted cash	51,530			135,661	147,910
Other current assets	175,544			63,608	58,209
Current assets	6,119,306			2,714,775	3,537,339
Finance receivables held for investment, net	662,201			5,256,798	5,499,836
Property, plant and equipment, net	6,381			13,197	14,864
Pension and postretirement assets	0			0	0
Goodwill	0			0	0
Deferred income taxes	3,464			88,109	92,208
Lease assets	2,612			3,225	3,533
Other long-term assets	138,178			26,805	46,247
Assets	6,932,142			8,102,909	9,194,027
Current liabilities:
Accounts payable	228,248			83,930	213,376
Accrued liabilities	213,366			155,437	151,907
Short-term deposits, net	292,667			173,099	178,638
Short-term debt	684,741			640,204	497,373
Current portion of long-term debt, net	1,329,244			1,401,682	2,111,776
Current liabilities	2,748,266			2,454,352	3,153,070
Long-term deposits, net	261,801			377,487	370,372
Long-term debt, net	2,402,328			4,171,696	4,442,648
Lease liabilities	2,178			2,900	3,134
Pension and postretirement liabilities	0			0	0
Deferred income taxes	1,866			1,124	3,227
Other long-term liabilities	53,330			60,123	28,697
Commitments and contingencies (Note 14)
Total equity	1,462,373			1,035,227	1,192,879
Total liabilities and shareholders' equity	6,932,142			8,102,909	9,194,027
Consolidating Adjustments
Current assets:
Cash and cash equivalents	0			0	0
Accounts receivable, net	(201,189)			(60,526)	(191,053)
Finance receivables held for sale, net	0
Finance receivables held for investment, net	0			0	0
Inventories, net	0			0	0
Restricted cash	0			0	0
Other current assets	(66,419)			(77,635)	(17,764)
Current assets	(267,608)			(138,161)	(208,817)
Finance receivables held for investment, net	0			0	0
Property, plant and equipment, net	0			0	0
Pension and postretirement assets	0			0	0
Goodwill	0			0	0
Deferred income taxes	(1,008)			(1,017)	(908)
Lease assets	0			0	0
Other long-term assets	(121,232)			(119,586)	(116,127)
Assets	(389,848)			(258,764)	(325,852)
Current liabilities:
Accounts payable	(201,189)			(60,526)	(191,053)
Accrued liabilities	(66,056)			(77,307)	(17,252)
Short-term deposits, net	0			0	0
Short-term debt	0			0	0
Current portion of long-term debt, net	0			0	0
Current liabilities	(267,245)			(137,833)	(208,305)
Long-term deposits, net	0			0	0
Long-term debt, net	0			0	0
Lease liabilities	0			0	0
Pension and postretirement liabilities	0			0	0
Deferred income taxes	0			0	0
Other long-term liabilities	1,752			1,754	1,892
Commitments and contingencies (Note 14)
Total equity	(124,355)			(122,685)	(119,439)
Total liabilities and shareholders' equity	$ (389,848)			$ (258,764)	$ (325,852)