v3.26.1
GM Financial Receivables and Transactions - Allowance for Loan Losses (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable [Roll Forward]          
Allowance for credit loss of finance receivables, percentage 3.10%   3.10%   2.90%
GM Financial          
Financing Receivable [Roll Forward]          
Allowance for loan losses at beginning of period $ 2,723 $ 2,567 $ 2,725 $ 2,458  
Provision for loan losses 389 354 656 682  
Charge-offs (538) (490) (1,079) (968)  
Recoveries 283 270 552 521  
Effect of foreign currency 9 19 12 28  
Allowance for loan losses at end of period $ 2,866 $ 2,720 $ 2,866 $ 2,720