CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Liberty Expedia Holdings	Common stock	Common stock Liberty Expedia Holdings	Common stock Class B common stock	Additional paid-in capital	Additional paid-in capital Liberty Expedia Holdings	Treasury stock	Treasury stock Liberty Expedia Holdings	Retained earnings (deficit)	Retained earnings (deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Non-redeemable non-controlling interest
Beginning balance (in shares) at Dec. 31, 2018				231,492,986		12,799,999			97,158,586
Beginning balance at Dec. 31, 2018	$ 5,651	$ 6		$ 0		$ 0	$ 9,549		$ (5,742)		$ 517	$ 6	$ (220)	$ 1,547
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	496										489			7
Other comprehensive income (loss), net of taxes	(56)												(38)	(18)
Payment of dividends to common stockholders	(145)										(145)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				4,037,832
Proceeds from exercise of equity instruments and employee stock purchase plans	277						277
Treasury stock activity related to vesting of equity instruments (in shares)									249,417
Treasury stock activity related to vesting of equity instruments	(31)								$ (31)
Liberty Expedia Holdings transaction, shares issued (in shares)					20,745,181
Liberty Expedia Holdings transaction, value of shares issued								$ 2,883
Stock repurchases (in shares)									2,300,944	23,876,671
Stock repurchased, value	(300)								$ (300)	$ (3,217)
Liberty Expedia Holdings transaction			$ (334)
Adjustment to the fair value of redeemable non-controlling interests	(17)										(17)
Other changes in ownership of non-controlling interests	16						(3)							19
Stock-based compensation expense	177						177
Other	1						1
Withholding taxes for stock options	(2)						(2)
Ending balance (in shares) at Sep. 30, 2019				256,275,999		12,799,999			123,585,618
Ending balance at Sep. 30, 2019	5,739			$ 0		$ 0	12,882		$ (9,290)		850		(258)	1,555
Beginning balance (in shares) at Jun. 30, 2019				234,102,186		12,799,999			97,384,212
Beginning balance at Jun. 30, 2019	5,907			$ 0		$ 0	9,821		$ (5,771)		508		(216)	1,565
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	409										409			0
Other comprehensive income (loss), net of taxes	(58)												(42)	(16)
Payment of dividends to common stockholders	(50)										(50)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				1,428,632
Proceeds from exercise of equity instruments and employee stock purchase plans	121						121
Treasury stock activity related to vesting of equity instruments (in shares)									23,791
Treasury stock activity related to vesting of equity instruments	(2)								$ (2)
Liberty Expedia Holdings transaction, shares issued (in shares)					20,745,181
Liberty Expedia Holdings transaction, value of shares issued								$ 2,883
Stock repurchases (in shares)									2,300,944	23,876,671
Stock repurchased, value	(300)								$ (300)	$ (3,217)
Liberty Expedia Holdings transaction			$ (334)
Adjustment to the fair value of redeemable non-controlling interests	(17)										(17)
Other changes in ownership of non-controlling interests	6													6
Stock-based compensation expense	58						58
Other	(1)						(1)
Ending balance (in shares) at Sep. 30, 2019				256,275,999		12,799,999			123,585,618
Ending balance at Sep. 30, 2019	5,739			$ 0		$ 0	12,882		$ (9,290)		850		(258)	1,555
Beginning balance (in shares) at Dec. 31, 2019				256,691,777		12,799,999			126,892,525
Beginning balance at Dec. 31, 2019	5,536			$ 0		$ 0	12,978		$ (9,673)		879		(217)	1,569
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,337)										(2,229)			(108)
Other comprehensive income (loss), net of taxes	(8)												(22)	14
Payment of dividends to common stockholders	(48)										(48)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				2,657,883
Proceeds from exercise of equity instruments and employee stock purchase plans	105						105
Treasury stock activity related to vesting of equity instruments (in shares)									442,739
Treasury stock activity related to vesting of equity instruments	$ (49)								$ (49)
Stock repurchases (in shares)	3,400,000								3,364,119
Stock repurchased, value	$ (370)								$ (370)
Adjustment to the fair value of redeemable non-controlling interests	4						4
Other changes in ownership of non-controlling interests	13						8							5
Stock-based compensation expense	173						173
Other (in shares)									20,630
Other	0						0
Payment of preferred dividends	(17)						(17)
Common stock warrants, net of issuance costs	110						110
Ending balance (in shares) at Sep. 30, 2020				259,349,660		12,799,999			130,720,013
Ending balance at Sep. 30, 2020	3,112			$ 0		$ 0	13,361		$ (10,092)		(1,398)		(239)	1,480
Beginning balance (in shares) at Jun. 30, 2020				259,084,932		12,799,999			130,670,373
Beginning balance at Jun. 30, 2020	3,203			$ 0		$ 0	13,300		$ (10,087)		(1,206)		(273)	1,469
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(200)										(192)			(8)
Other comprehensive income (loss), net of taxes	48												34	14
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				264,728
Proceeds from exercise of equity instruments and employee stock purchase plans	9						9
Treasury stock activity related to vesting of equity instruments (in shares)									49,640
Treasury stock activity related to vesting of equity instruments	(5)								$ (5)
Liberty Expedia Holdings transaction, value of shares issued							110
Other changes in ownership of non-controlling interests	3						(2)							5
Stock-based compensation expense	55						55
Other	(1)						(1)
Ending balance (in shares) at Sep. 30, 2020				259,349,660		12,799,999			130,720,013
Ending balance at Sep. 30, 2020	$ 3,112			$ 0		$ 0	$ 13,361		$ (10,092)		$ (1,398)		$ (239)	$ 1,480