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Common Stock (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) |  | 5,065,454 |  |  | 4,960,752 |  |  | 18,174,839 | 16,627,760
Value of treasury stock shares repurchased/withheld |  | $ 2,225 | $ 3,687 | $ 3,333 | $ 3,666 | $ 3,516 | $ 3,652 | $ 9,245 | $ 10,834
Remaining authorized repurchase amount |  | $ 680 |  |  |  |  |  | $ 680 |
Share buybacks |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) |  | 5,006,943 |  |  | 4,738,842 |  |  | 17,597,370 | 15,442,417
Value of treasury stock shares repurchased/withheld |  | $ 2,218 |  |  | $ 3,584 |  |  | $ 9,065 | $ 10,450
Share buybacks | Liberty Broadband |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) |  | 1,724,540 |  |  | 1,200,547 |  |  | 4,952,224 | 3,962,155
Value of treasury stock shares repurchased/withheld |  | $ 796 |  |  | $ 880 |  |  | $ 2,602 | $ 2,642
Share buybacks | Liberty Broadband | Subsequent Event |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) | 500,000 |  |  |  |  |  |  |  |
Value of treasury stock shares repurchased/withheld | $ 183 |  |  |  |  |  |  |  |
Income tax withholding |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) |  | 14,595 |  |  | 104,949 |  |  | 304,070 | 572,869
Value of treasury stock shares repurchased/withheld |  | $ 7 |  |  | $ 82 |  |  | $ 180 | $ 384
Exercise cost |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Treasury stock acquired (shares) |  | 43,916 |  |  | 116,961 |  |  | 273,399 | 612,474

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