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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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