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Stockholders' Equity and Noncontrolling Interests - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Aug. 31, 2022 | Jun. 30, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock shares authorized (in shares) |  | 2,000,000,000 |  |  |  | 2,000,000,000 |  | 2,000,000,000 |  |
Common stock shares authorized (in shares) |  | 5,000,000,000 |  |  |  | 5,000,000,000 |  | 5,000,000,000 |  |
Preferred stock shares outstanding (in shares) |  | 0 |  |  |  | 0 |  | 0 |  |
Preferred stock shares issued (in shares) |  | 0 |  |  |  | 0 |  | 0 |  |
Common stock shares issued (in shares) |  | 1,400,000,000 |  |  |  | 1,400,000,000 |  | 1,400,000,000 |  |
Common stock shares outstanding (in shares) |  | 1,400,000,000 |  |  |  | 1,400,000,000 |  | 1,400,000,000 |  |
Cash dividends paid on common stock |  | $ 123 | $ 124 | $ 126 | $ 130 | $ 373 | $ 130 |  |  |
Purchase of common stock |  | 250 | $ 500 | $ 369 | $ 1,500 |  |  |  |  |
Cruise Stock Incentive Awards |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Cash used to settle awards |  |  |  |  |  | 206 | 327 |  |  |
GM Cruise Holdings LLC |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Payments to acquire additional investment | $ 1,350 |  |  |  |  |  |  |  |  |
GM Cruise Holdings LLC |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Net income attributable to shareholders and transfers to the noncontrolling interests |  |  |  |  |  | 8,000 | 7,100 |  |  |
Common Class B |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Recorded value of vested awards |  | 93 |  |  |  | 93 |  | $ 60 |  |
Common Class B | Cruise Stock Incentive Awards |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Cash used to settle awards |  | 70 |  |  |  | 206 |  |  |  |
Common Class B | GM Cruise Holdings LLC |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of stock issued during period |  | 104 |  |  |  | 278 |  |  |  |
Payments for statutory tax withholdings |  | $ 57 |  |  |  | $ 156 |  |  |  |
Cruise Preferred Shares |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Decrease in equity due to preferred stock redemption |  |  |  |  |  |  | $ 820 |  |  |
SoftBank | Cruise Class A-1, Class F and Class G Preferred Shares | GM Cruise Holdings LLC |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Payments for repurchase of equity | $ 2,100 |  |  |  |  |  |  |  |  |
Common Stock Repurchase Program |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Increased capacity under common stock repurchase plan |  |  |  |  |  |  |  |  | $ 5,000 |
Remaining authorized repurchase amount |  |  |  |  |  |  |  |  |  | $ 3,300
Common stock shares repurchased during period |  |  |  |  |  | 30,000,000 | 38,000,000 |  |  |
Purchase of common stock |  |  |  |  |  | $ 1,100 | $ 1,500 |  |  |

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