Supplemental Consolidating Data - Schedule of Cash Flows (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
Cash flows from operating activities:
Net income	$ 375,165	$ 105,745	$ 130,797	$ 115,967	$ 215,406	$ 232,233	$ 611,709	$ 563,605
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization							126,339	119,568
Amortization of deferred loan origination costs							43,871	54,461
Amortization of financing origination fees							9,773	10,363
Income related to long-term employee benefits							(41,287)	(40,076)
Employee benefit plan contributions and payments							(5,091)	(3,781)
Stock compensation expense							25,838	39,820
Net change in wholesale finance receivables related to sales							(183,006)	(211,800)
Provision for credit losses							(198,427)	175,017
Origination of finance receivables held for sale							(414,009)	0
Collections from finance receivables held for sale							16,916	0
Gain on sale of securitization beneficial interests							(26,958)	0
Deferred income taxes							92,122	(1,815)
Other, net							19,360	19,557
Changes in current assets and liabilities:
Accounts receivable, net							(46,415)	(36,529)
Finance receivables – accrued interest and other							11,279	2,325
Inventories, net							262,287	253,373
Accounts payable and accrued liabilities							75,039	(12,903)
Other current assets							37,563	(530)
Total adjustments							(194,806)	367,050
Net cash provided by operating activities							416,903	930,655
Cash flows from investing activities:
Capital expenditures							(102,090)	(140,424)
Origination of finance receivables held for investment							(2,287,369)	(3,002,737)
Collections on finance receivables held for investment							2,459,406	2,657,149
Proceeds from sale of securitization beneficial interests, net							125,369	0
Collection of retained securitization beneficial interests							9,353	0
Other investing activities							808	(165)
Net cash used by investing activities							205,477	(486,177)
Cash flows from financing activities:
Proceeds from securitization debt							497,790	1,145,211
Repayments of senior unsecured notes							450,000	0
Proceeds from issuance of medium-term notes							647,088	495,856
Repayments of medium-term notes							(700,000)	0
Proceeds from term loan							448,013	0
Repayments of securitization debt							(718,034)	(782,161)
Borrowings of asset-backed commercial paper							155,000	366,171
Repayments of asset-backed commercial paper							(217,554)	(195,709)
Net decrease in unsecured commercial paper							44,938	(387,392)
Net increase (decrease) in deposits							3,312	100,737
Dividends paid							(66,288)	(69,454)
Repurchase of common stock							(193,209)	(359,810)
Other financing activities							1,269	11
Net cash (used) provided by financing activities							(547,675)	313,460
Effect of exchange rate changes on cash, cash equivalents and restricted cash							11,009	198
Net increase in cash, cash equivalents and restricted cash							85,714	758,136
Cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash, beginning of period			1,740,854			1,648,811	1,740,854	1,648,811
Net increase in cash, cash equivalents and restricted cash							85,714	758,136
Cash, cash equivalents and restricted cash, end of period	1,826,568			2,406,947			1,826,568	2,406,947
Reportable Legal Entities | Non-Financial Services Entities
Cash flows from operating activities:
Net income	53,253			59,441			189,601	414,535
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization							119,178	112,605
Amortization of deferred loan origination costs							0	0
Amortization of financing origination fees							694	540
Income related to long-term employee benefits							(41,287)	(40,076)
Employee benefit plan contributions and payments							(5,091)	(3,781)
Stock compensation expense							24,192	38,234
Net change in wholesale finance receivables related to sales							0	0
Provision for credit losses							0	0
Origination of finance receivables held for sale							0
Collections from finance receivables held for sale							0
Gain on sale of securitization beneficial interests							0
Deferred income taxes							6,109	3,347
Other, net							(9,166)	15,505
Changes in current assets and liabilities:
Accounts receivable, net							(187,078)	(79,746)
Finance receivables – accrued interest and other							0	0
Inventories, net							262,287	253,373
Accounts payable and accrued liabilities							3,969	(35,743)
Other current assets							68,175	(23,008)
Total adjustments							241,982	241,250
Net cash provided by operating activities							431,583	655,785
Cash flows from investing activities:
Capital expenditures							(101,672)	(139,295)
Origination of finance receivables held for investment							0	0
Collections on finance receivables held for investment							0	0
Proceeds from sale of securitization beneficial interests, net							0
Collection of retained securitization beneficial interests
Other investing activities							808	(1,165)
Net cash used by investing activities							(100,864)	(140,460)
Cash flows from financing activities:
Proceeds from securitization debt							0	0
Repayments of senior unsecured notes							450,000
Proceeds from issuance of medium-term notes							0	0
Repayments of medium-term notes							0
Proceeds from term loan							448,013
Repayments of securitization debt							0	0
Borrowings of asset-backed commercial paper							0	0
Repayments of asset-backed commercial paper							0	0
Net decrease in unsecured commercial paper							0	0
Net increase (decrease) in deposits							0	0
Dividends paid							(66,288)	(69,454)
Repurchase of common stock							(193,209)	(359,810)
Other financing activities							1,269	11
Net cash (used) provided by financing activities							(260,215)	(429,253)
Effect of exchange rate changes on cash, cash equivalents and restricted cash							9,014	(171)
Net increase in cash, cash equivalents and restricted cash							79,518	85,901
Cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash, beginning of period			1,105,663			1,127,400	1,105,663	1,127,400
Net increase in cash, cash equivalents and restricted cash							79,518	85,901
Cash, cash equivalents and restricted cash, end of period	1,185,181			1,213,301			1,185,181	1,213,301
Reportable Legal Entities | Financial Services Entities
Cash flows from operating activities:
Net income	321,889			56,504			422,132	149,037
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization							7,161	6,963
Amortization of deferred loan origination costs							43,871	54,461
Amortization of financing origination fees							9,079	9,823
Income related to long-term employee benefits							0	0
Employee benefit plan contributions and payments							0	0
Stock compensation expense							1,646	1,586
Net change in wholesale finance receivables related to sales							0	0
Provision for credit losses							(198,427)	175,017
Origination of finance receivables held for sale							(414,009)
Collections from finance receivables held for sale							16,916
Gain on sale of securitization beneficial interests							(26,958)
Deferred income taxes							86,022	(4,724)
Other, net							28,502	4,085
Changes in current assets and liabilities:
Accounts receivable, net							0	0
Finance receivables – accrued interest and other							11,279	2,325
Inventories, net							0	0
Accounts payable and accrued liabilities							194,538	53,591
Other current assets							(19,396)	12,295
Total adjustments							(259,776)	315,422
Net cash provided by operating activities							162,356	464,459
Cash flows from investing activities:
Capital expenditures							(418)	(1,129)
Origination of finance receivables held for investment							(4,477,446)	(5,671,416)
Collections on finance receivables held for investment							4,472,447	5,136,239
Proceeds from sale of securitization beneficial interests, net							125,369
Collection of retained securitization beneficial interests							9,353
Other investing activities							0	0
Net cash used by investing activities							129,305	(536,306)
Cash flows from financing activities:
Proceeds from securitization debt							497,790	1,145,211
Repayments of senior unsecured notes							0
Proceeds from issuance of medium-term notes							647,088	495,856
Repayments of medium-term notes							(700,000)
Proceeds from term loan							0
Repayments of securitization debt							(718,034)	(782,161)
Borrowings of asset-backed commercial paper							155,000	366,171
Repayments of asset-backed commercial paper							(217,554)	(195,709)
Net decrease in unsecured commercial paper							44,938	(387,392)
Net increase (decrease) in deposits							3,312	100,737
Dividends paid							0	0
Repurchase of common stock							0	0
Other financing activities							0	1,000
Net cash (used) provided by financing activities							(287,460)	743,713
Effect of exchange rate changes on cash, cash equivalents and restricted cash							1,995	369
Net increase in cash, cash equivalents and restricted cash							6,196	672,235
Cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash, beginning of period			635,191			521,411	635,191	521,411
Net increase in cash, cash equivalents and restricted cash							6,196	672,235
Cash, cash equivalents and restricted cash, end of period	641,387			1,193,646			641,387	1,193,646
Consolidating Adjustments
Cash flows from operating activities:
Net income	23			22			(24)	33
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization							0	0
Amortization of deferred loan origination costs							0	0
Amortization of financing origination fees							0	0
Income related to long-term employee benefits							0	0
Employee benefit plan contributions and payments							0	0
Stock compensation expense							0	0
Net change in wholesale finance receivables related to sales							(183,006)	(211,800)
Provision for credit losses							0	0
Origination of finance receivables held for sale							0
Collections from finance receivables held for sale							0
Gain on sale of securitization beneficial interests							0
Deferred income taxes							(9)	(438)
Other, net							24	(33)
Changes in current assets and liabilities:
Accounts receivable, net							140,663	43,217
Finance receivables – accrued interest and other							0	0
Inventories, net							0	0
Accounts payable and accrued liabilities							(123,468)	(30,751)
Other current assets							(11,216)	10,183
Total adjustments							(177,012)	(189,622)
Net cash provided by operating activities							(177,036)	(189,589)
Cash flows from investing activities:
Capital expenditures							0	0
Origination of finance receivables held for investment							2,190,077	2,668,679
Collections on finance receivables held for investment							(2,013,041)	(2,479,090)
Proceeds from sale of securitization beneficial interests, net							0
Collection of retained securitization beneficial interests
Other investing activities							0	1,000
Net cash used by investing activities							177,036	190,589
Cash flows from financing activities:
Proceeds from securitization debt							0	0
Repayments of senior unsecured notes							0
Proceeds from issuance of medium-term notes							0	0
Repayments of medium-term notes							0
Proceeds from term loan							0
Repayments of securitization debt							0	0
Borrowings of asset-backed commercial paper							0	0
Repayments of asset-backed commercial paper							0	0
Net decrease in unsecured commercial paper							0	0
Net increase (decrease) in deposits							0	0
Dividends paid							0	0
Repurchase of common stock							0	0
Other financing activities							0	(1,000)
Net cash (used) provided by financing activities							0	(1,000)
Effect of exchange rate changes on cash, cash equivalents and restricted cash							0	0
Net increase in cash, cash equivalents and restricted cash							0	0
Cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash, beginning of period			$ 0			$ 0	0	0
Net increase in cash, cash equivalents and restricted cash							0	0
Cash, cash equivalents and restricted cash, end of period	$ 0			$ 0			$ 0	$ 0