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Debt - Automotive and GM Financial Debt (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Automotive |  |  |
Debt Instrument [Line Items] |  |  |
Finance lease liabilities |  | $ 381 | $ 349
Carrying Amount |  | 17,844 | 16,818
Finance lease liabilities, Fair Value |  | 381 | 362
Fair Value |  | 16,828 | 20,569
Available under credit facility agreements |  | $ 15,095 | $ 15,208
Weighted-average interest rate on outstanding short-term debt |  | 6.10% | 9.80%
Weighted-average interest rate on outstanding long-term debt |  | 5.80% | 5.80%
Net discount and debt issuance costs |  | $ 525 | $ 512
Automotive | Secured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  | 124 | 192
Fair Value |  | 123 | 212
Automotive | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  | 17,340 | 16,277
Fair Value |  | 16,323 | 19,995
Automotive | Level 1 |  |  |
Debt Instrument [Line Items] |  |  |
Fair Value |  | 15,971 | 19,085
Automotive | Level 2 |  |  |
Debt Instrument [Line Items] |  |  |
Fair Value |  | 857 | 1,484
GM Financial |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  | 96,854 | 92,561
Fair Value |  | 93,738 | 93,758
GM Financial | Secured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  | 42,131 | 39,338
Fair Value |  | 41,467 | 39,401
GM Financial | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  | 54,723 | 53,223
Fair Value |  | $ 52,270 | 54,357
GM Financial | Unsecured Debt | Line of Credit | $2.0 Billion Dollar Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Debt term | 364 days | 364 days |
Aggregate borrowing capacity | $ 2,000 | $ 2,000 |
GM Financial | Level 2 |  |  |
Debt Instrument [Line Items] |  |  |
Fair Value |  | 91,545 | 92,250
GM Financial | Level 3 |  |  |
Debt Instrument [Line Items] |  |  |
Fair Value |  | $ 2,192 | $ 1,508

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