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Stockholders' Equity and Noncontrolling Interests - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock shares authorized (in shares) |  | 2,000,000,000.0 |  |  |  | 2,000,000,000.0 |  | 2,000,000,000.0
Common stock shares authorized (in shares) |  | 5,000,000,000.0 |  |  |  | 5,000,000,000.0 |  | 5,000,000,000.0
Preferred stock shares issued (in shares) |  | 0 |  |  |  | 0 |  | 0
Preferred stock shares outstanding (in shares) |  | 0 |  |  |  | 0 |  | 0
Common stock shares issued (in shares) |  | 957,000,000 |  |  |  | 957,000,000 |  | 995,000,000
Common stock shares outstanding (in shares) |  | 957,000,000 |  |  |  | 957,000,000 |  | 995,000,000
Cash dividends paid on common stock |  | $ 144 | $ 116 | $ 136 | $ 139 | $ 260 | $ 274 |
Purchase of common stock |  | 0 | $ 2,012 | $ 1,030 | $ 331 |  |  |
Cruise Preferred Shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Increase in equity due to preferred stock redemption |  |  |  |  |  | 538 |  |
GM Cruise Holdings LLC |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Net income attributable to shareholders and transfers to the noncontrolling interests |  | $ 1,900 |  |  |  | $ 5,200 |  |
Common Stock Repurchase Program |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Increased capacity under common stock repurchase plan | $ 6,000 |  |  |  |  |  |  |
Capacity under common stock repurchase plan | 6,300 |  |  |  |  |  |  |
Purchase of common stock |  |  |  |  |  |  | $ 1,400 |
Shares repurchased and retired during period (in shares) |  |  |  |  |  |  | 31,000,000 |
Accelerated Share Repurchase |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Capacity under common stock repurchase plan | 2,000 |  |  |  |  |  |  |
Amount advanced during period | $ 2,000 |  |  |  |  |  |  |
Common stock shares repurchased during period (in shares) | 33,000,000 |  |  |  |  |  |  |
Purchase of common stock | $ 1,600 |  |  |  |  |  |  |
Shares repurchased and retired during period (in shares) |  | 10,000,000 |  |  |  |  |  |

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