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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, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables $ 119,085 $ 120,707
Dealer Loans | Total past due    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 7 8
Non-Consumer    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables $ 36,120 $ 35,335
Percent 100.00% 100.00%
Non-Consumer | Group I    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Percent 87.90% 85.50%
Non-Consumer | Group II    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Percent 10.00% 12.60%
Non-Consumer | Group III    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Percent 2.00% 1.80%
Non-Consumer | Group IV    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Percent 0.10% 0.10%
Non-Consumer | Dealer financing    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables $ 33,621 $ 32,933
Financing receivable, revolving, writeoff 14 11
Non-Consumer | Dealer financing | Group I    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 29,541 28,169
Non-Consumer | Dealer financing | Group II    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 3,371 4,139
Non-Consumer | Dealer financing | Group III    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 686 599
Non-Consumer | Dealer financing | Group IV    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 23 26
Non-Consumer | Dealer Loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivable, originated, more than five years before current fiscal year 313 295
Financing receivable, year five, originated, four years before current fiscal year 30 76
Financing receivable, originated three years before latest fiscal year 164 35
Financing receivable, originated two years before latest fiscal year 126 184
Financing receivable, originated in fiscal year before latest fiscal year 187 125
Financing receivable, originated in current fiscal year 282 325
Financing receivables 1,102 1,040
Financing receivable, originated, more than five years before current fiscal year, writeoff 0 0
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 0 1
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 0 1
Non-Consumer | Dealer Loans | Group I    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivable, originated, more than five years before current fiscal year 262 269
Financing receivable, year five, originated, four years before current fiscal year 28 68
Financing receivable, originated three years before latest fiscal year 152 31
Financing receivable, originated two years before latest fiscal year 78 149
Financing receivable, originated in fiscal year before latest fiscal year 161 78
Financing receivable, originated in current fiscal year 249 268
Financing receivables 930 863
Non-Consumer | Dealer Loans | Group II    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivable, originated, more than five years before current fiscal year 45 25
Financing receivable, year five, originated, four years before current fiscal year 2 8
Financing receivable, originated three years before latest fiscal year 12 4
Financing receivable, originated two years before latest fiscal year 47 33
Financing receivable, originated in fiscal year before latest fiscal year 23 46
Financing receivable, originated in current fiscal year 27 44
Financing receivables 156 160
Non-Consumer | Dealer Loans | Group III    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivable, originated, more than five years before current fiscal year 6 1
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 2
Financing receivable, originated in fiscal year before latest fiscal year 2 1
Financing receivable, originated in current fiscal year 6 11
Financing receivables 14 15
Non-Consumer | Dealer Loans | Group IV    
Financing Receivable, Allowance for Credit Loss [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 1 0
Financing receivable, originated in fiscal year before latest fiscal year 1 0
Financing receivable, originated in current fiscal year 0 2
Financing receivables 2 2
Non-Consumer | Wholesale Loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 32,519 31,893
Financing receivable, revolving, writeoff 14 10
Non-Consumer | Wholesale Loans | Group I    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 28,611 27,306
Non-Consumer | Wholesale Loans | Group II    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 3,215 3,979
Non-Consumer | Wholesale Loans | Group III    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables 672 584
Non-Consumer | Wholesale Loans | Group IV    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Financing receivables $ 21 $ 24