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Derivative Financial Instruments - Notional Amounts for Derivative Financial Instruments (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Automotive | Stellantis N.V. | Common Stock |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of shares called by warrants | 69.2 |  | 69.2 |  |
Automotive | Stellantis warrants, formerly known as PSA warrants | Stellantis N.V. |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Warrants outstanding (in shares) | 39.7 |  | 39.7 |  |
Automotive | Not Designated as Hedges |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | $ 6,235 |  | $ 6,235 |  | $ 5,822
Automotive | Not Designated as Hedges | PSA Group | Interest Income and Other Non-Operating Income, Net |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gains (losses) on derivative instruments | (221) | $ 154 | (419) | $ 364 |
Automotive | Not Designated as Hedges | Foreign currency | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 4,948 |  | 4,948 |  | 4,228
Automotive | Not Designated as Hedges | Commodity | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 1,245 |  | 1,245 |  | 1,549
Automotive | Not Designated as Hedges | Stellantis warrants, formerly known as PSA warrants | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 42 |  | 42 |  | 45
Automotive | Not Designated as Hedges | Fair Value Hedges | Stellantis warrants, formerly known as PSA warrants | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Fair Value of Assets | 1,000 |  | 1,000 |  | 1,400
GM Financial |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 139,523 |  | 139,523 |  | 133,971
Fair Value of Assets | 1,560 |  | 1,560 |  | 1,017
Fair Value of Liabilities | 2,368 |  | 2,368 |  | 691
Collateral | 272 |  | 272 |  | 376
Collateral available for netting | 864 |  | 864 |  |
GM Financial | Designated as Hedges | Fair Value Hedges | Interest rate swaps | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 21,600 |  | 21,600 |  | 15,058
Fair Value of Assets | 2 |  | 2 |  | 74
Fair Value of Liabilities | 536 |  | 536 |  | 88
GM Financial | Designated as Hedges | Fair Value Hedges | Foreign currency swaps | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 0 |  | 0 |  | 682
Fair Value of Assets | 0 |  | 0 |  | 0
Fair Value of Liabilities | 0 |  | 0 |  | 59
GM Financial | Designated as Hedges | Cash Flow Hedges | Interest rate swaps | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 806 |  | 806 |  | 611
Fair Value of Assets | 25 |  | 25 |  | 12
Fair Value of Liabilities | 0 |  | 0 |  | 4
GM Financial | Designated as Hedges | Cash Flow Hedges | Foreign currency swaps | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 7,444 |  | 7,444 |  | 7,419
Fair Value of Assets | 7 |  | 7 |  | 85
Fair Value of Liabilities | 649 |  | 649 |  | 201
GM Financial | Not Designated as Hedges | Foreign currency | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 0 |  | 0 |  | 148
Fair Value of Assets | 0 |  | 0 |  | 0
Fair Value of Liabilities | 0 |  | 0 |  | 0
GM Financial | Not Designated as Hedges | Interest rate contracts | Fair Value Level 2 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 109,673 |  | 109,673 |  | 110,053
Fair Value of Assets | 1,526 |  | 1,526 |  | 846
Fair Value of Liabilities | $ 1,183 |  | $ 1,183 |  | $ 339

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