Capital Stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	May 05, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	May 06, 2020	Dec. 31, 2019	Apr. 26, 2018
Equity, Class of Treasury Stock [Line Items]
Closing fees, paid	$ 12
Issuance of preferred dividend				$ 17
Preferred dividends declared per common share (in dollars per share)				$ 14.58
Treasury stock (in shares)		130,720,000		130,720,000			126,893,000
Authorized share repurchase							20,000,000	15,000,000
Stock repurchases (in shares)				3,400,000
Stock repurchased, value			$ 300	$ 370	$ 300
Average repurchase price per share (in dollars per share)				$ 109.88
Shares authorized and remaining under the repurchase program		23,300,000		23,300,000
Additional paid-in capital
Equity, Class of Treasury Stock [Line Items]
Liberty Expedia Holdings transaction, shares issued		$ 110
Issuance of preferred dividend				$ 17
Common stock
Equity, Class of Treasury Stock [Line Items]
Treasury stock (in shares)		123,400,000		123,400,000			119,600,000
Class B Common Stock
Equity, Class of Treasury Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001		$ 0.0001			$ 0.0001
Treasury stock (in shares)		7,300,000		7,300,000			7,300,000
Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Preferred stock, par value (in dollars per share)		$ 0.001		$ 0.001			$ 0.001
Common stock, voting power, percentage	50.00%					20.00%
Preferred stock, dividend rate, percentage	9.50%
Preferred stock, liquidation preference, percent	105.00%
Preferred stock, liquidation preference (in dollars per share)	$ 1,000
Series A Preferred Stock		$ 1,022		$ 1,022			$ 0
Initial discount and issuance costs related to preferred stock				68
Issuance of preferred dividend		$ 29		46
Cash paid for preferred stock dividends				$ 17
Preferred dividends declared per common share (in dollars per share)				$ 14.58
Series A Preferred Stock | Fifth, Sixth And Seventh Anniversaries
Equity, Class of Treasury Stock [Line Items]
Preferred stock, increase in dividend rate, percentage	1.00%
Series A Preferred Stock | Eighth And Ninth Anniversaries
Equity, Class of Treasury Stock [Line Items]
Preferred stock, increase in dividend rate, percentage	1.50%
Warrant
Equity, Class of Treasury Stock [Line Items]
Common stock, voting power, percentage	50.00%
Class of warrant or right, expiration period	10 years
Upon the occurrence of certain change of control triggering events | Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Preferred stock, liquidation preference, percent	103.00%
Notes prior to November 15, 2029 | Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Preferred stock, liquidation preference, percent	102.00%
Notes on or after November 15, 2029 | Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Preferred stock, liquidation preference, percent	101.00%
Apollo Purchaser
Equity, Class of Treasury Stock [Line Items]
Proceeds from issuance of private placement	$ 588
Apollo Purchaser | Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	600,000
Preferred stock, par value (in dollars per share)	$ 0.001
Apollo Purchaser | Warrant
Equity, Class of Treasury Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.0001
Warrants purchased (in shares)	4,200,000
Class of warrant or right, exercise price of warrants or rights	$ 72.00
Silver Lake Purchaser
Equity, Class of Treasury Stock [Line Items]
Proceeds from issuance of private placement	$ 588
Silver Lake Purchaser | Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	600,000
Silver Lake Purchaser | Warrant
Equity, Class of Treasury Stock [Line Items]
Warrants purchased (in shares)	4,200,000
Class of warrant or right, exercise price of warrants or rights	$ 72.00