GM Financial Receivables, Net Summary of Finance Receivables, Net (Details) - GM Financial [Member] - USD ($) $ in Millions |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2013 |
|---|---|---|---|---|---|---|
| Finance Receivables [Line Items] | ||||||
| Finance Receivables | $ 34,969 | $ 33,229 | ||||
| Less: Allowance for Loan Losses | (760) | $ (728) | (695) | $ (615) | $ (586) | $ (548) |
| GM Financial Receivables, Net | 34,209 | 32,534 | ||||
| Fair value of GM Financial receivables, net | 34,573 | 33,106 | ||||
| Allowance for loans losses classified as current | (590) | (529) | ||||
| Consumer Finance Receivables [Member] | ||||||
| Finance Receivables [Line Items] | ||||||
| Finance Receivables | 27,330 | 25,623 | ||||
| Less: Allowance for Loan Losses | (721) | (655) | ||||
| GM Financial Receivables, Net | 26,609 | 24,968 | ||||
| Commercial Finance Receivables [Member] | ||||||
| Finance Receivables [Line Items] | ||||||
| Finance Receivables | 7,639 | 7,606 | ||||
| Less: Allowance for Loan Losses | (39) | (40) | ||||
| GM Financial Receivables, Net | $ 7,600 | $ 7,566 |