FINANCE RECEIVABLES AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Credit Quality Analysis of Dealer Financing Receivables (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Allowance for Credit Losses [Line Items]
Financing Receivables	$ 121,610	$ 122,814
Dealer Loans | Total past due
Allowance for Credit Losses [Line Items]
Financing Receivables	6	8
Non-Consumer
Allowance for Credit Losses [Line Items]
Financing Receivables	$ 37,652	$ 39,482
Percent	100.00%	100.00%
Non-Consumer | Group I
Allowance for Credit Losses [Line Items]
Percent	88.10%	91.70%
Non-Consumer | Group II
Allowance for Credit Losses [Line Items]
Percent	10.30%	6.90%
Non-Consumer | Group III
Allowance for Credit Losses [Line Items]
Percent	1.50%	1.30%
Non-Consumer | Group IV
Allowance for Credit Losses [Line Items]
Percent	0.10%	0.10%
Non-Consumer | Wholesale and Dealer Loans [Member]
Allowance for Credit Losses [Line Items]
Financing Receivables	$ 35,525	$ 37,384
Financing receivable, revolving, writeoff	13	7
Non-Consumer | Wholesale and Dealer Loans [Member] | Group I
Allowance for Credit Losses [Line Items]
Financing Receivables	31,277	34,298
Non-Consumer | Wholesale and Dealer Loans [Member] | Group II
Allowance for Credit Losses [Line Items]
Financing Receivables	3,671	2,570
Non-Consumer | Wholesale and Dealer Loans [Member] | Group III
Allowance for Credit Losses [Line Items]
Financing Receivables	533	469
Non-Consumer | Wholesale and Dealer Loans [Member] | Group IV
Allowance for Credit Losses [Line Items]
Financing Receivables	44	47
Non-Consumer | Dealer Loans
Allowance for Credit Losses [Line Items]
Financing receivable, originated, more than five years before current fiscal year	321	283
Financing receivable, year five, originated, four years before current fiscal year	78	63
Financing receivable, originated three years before latest fiscal year	36	102
Financing receivable, originated two years before latest fiscal year	206	48
Financing receivable, originated in fiscal year before latest fiscal year	131	260
Financing receivable, originated in current fiscal year	213	281
Financing Receivables	985	1,037
Financing receivable, originated, more than five years before current fiscal year, writeoff	0	1
Financing receivable, year five, originated, four years before current fiscal year, writeoff	0	0
Financing receivable, year four, originated, three years before current fiscal year, writeoff	0	0
Financing receivable, year three, originated, two years before current fiscal year, writeoff	3	0
Financing receivable, year two, originated, fiscal year before current fiscal year, writeoff	0	0
Financing receivable, year one, originated, current fiscal year, writeoff	0	0
Financing receivable, revolving, writeoff	3	1
Non-Consumer | Dealer Loans | Group I
Allowance for Credit Losses [Line Items]
Financing receivable, originated, more than five years before current fiscal year	295	270
Financing receivable, year five, originated, four years before current fiscal year	70	63
Financing receivable, originated three years before latest fiscal year	33	97
Financing receivable, originated two years before latest fiscal year	171	47
Financing receivable, originated in fiscal year before latest fiscal year	82	231
Financing receivable, originated in current fiscal year	169	245
Financing Receivables	820	953
Non-Consumer | Dealer Loans | Group II
Allowance for Credit Losses [Line Items]
Financing receivable, originated, more than five years before current fiscal year	26	13
Financing receivable, year five, originated, four years before current fiscal year	8	0
Financing receivable, originated three years before latest fiscal year	3	3
Financing receivable, originated two years before latest fiscal year	34	1
Financing receivable, originated in fiscal year before latest fiscal year	47	28
Financing receivable, originated in current fiscal year	34	31
Financing Receivables	152	76
Non-Consumer | Dealer Loans | Group III
Allowance for Credit Losses [Line Items]
Financing receivable, originated, more than five years before current fiscal year	0	0
Financing receivable, year five, originated, four years before current fiscal year	0	0
Financing receivable, originated three years before latest fiscal year	0	2
Financing receivable, originated two years before latest fiscal year	1	0
Financing receivable, originated in fiscal year before latest fiscal year	1	1
Financing receivable, originated in current fiscal year	5	4
Financing Receivables	7	7
Non-Consumer | Dealer Loans | Group IV
Allowance for Credit Losses [Line Items]
Financing receivable, originated, more than five years before current fiscal year	0	0
Financing receivable, year five, originated, four years before current fiscal year	0	0
Financing receivable, originated three years before latest fiscal year	0	0
Financing receivable, originated two years before latest fiscal year	0	0
Financing receivable, originated in fiscal year before latest fiscal year	1	0
Financing receivable, originated in current fiscal year	5	1
Financing Receivables	6	1
Non-Consumer | Wholesale Loans
Allowance for Credit Losses [Line Items]
Financing Receivables	34,540	36,347
Financing receivable, revolving, writeoff	10	6
Non-Consumer | Wholesale Loans | Group I
Allowance for Credit Losses [Line Items]
Financing Receivables	30,457	33,345
Non-Consumer | Wholesale Loans | Group II
Allowance for Credit Losses [Line Items]
Financing Receivables	3,519	2,494
Non-Consumer | Wholesale Loans | Group III
Allowance for Credit Losses [Line Items]
Financing Receivables	526	462
Non-Consumer | Wholesale Loans | Group IV
Allowance for Credit Losses [Line Items]
Financing Receivables	$ 38	$ 46