CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Liberty Expedia Holdings	Cumulative effect, period of adoption, adjustment	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 - Common and Class B	Treasury stock - Common and Class B Liberty Expedia Holdings	Retained earnings (deficit)	Retained earnings (deficit) Cumulative effect, period of adoption, adjustment	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative effect, period of adoption, adjustment	Non-redeemable non-controlling interest
Beginning Balance, shares issued (in shares) at Dec. 31, 2017				228,467,355		12,799,999			89,528,255
Beginning Balance at Dec. 31, 2017	$ 6,129		$ (34)	$ 0		$ 0	$ 9,163		$ (4,822)		$ 331	$ (31)	$ (149)	$ (3)	$ 1,606
Net income (loss)	397										406				(9)
Other comprehensive income (loss), net of taxes	(86)												(68)		(18)
Payment of dividends to stockholders	(186)										(186)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				2,850,591
Proceeds from exercise of equity instruments and employee stock purchase plans	166			$ 0			166
Withholding taxes for stock options	$ (2)						(2)
Stock repurchases (in shares)	7,700,000								7,720,194
Stock repurchased, value	$ (904)								$ (904)
Issuance of common stock in connection with acquisitions (in shares)				175,040
Issuance of common stock in connection with acquisitions	0			$ 0			0
Treasury stock activity related to vesting of equity instruments (in shares)									179,783
Treasury stock activity related to vesting of equity instruments	(20)								$ (20)
Proceeds from issuance of treasury stock (in shares)									(269,646)
Proceeds from issuance of treasury stock	31						27		$ 4
Adjustment to the fair value of redeemable non-controlling interests	(3)						0				(3)
Purchase of remaining interest in Air Asia	(62)						(5)								(57)
Other changes in non-controlling interests	18						(7)								25
Stock-based compensation expense	208						208
Other	(1)						(1)
Ending Balance, shares issued (in shares) at Dec. 31, 2018				231,492,986		12,799,999			97,158,586
Ending Balance at Dec. 31, 2018	5,651		$ 6	$ 0		$ 0	9,549		$ (5,742)		517	$ 6	(220)		1,547
Net income (loss)	574										565				9
Other comprehensive income (loss), net of taxes	(5)												3		(8)
Payment of dividends to stockholders	(195)										(195)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				4,453,610
Proceeds from exercise of equity instruments and employee stock purchase plans	301			$ 0			301
Withholding taxes for stock options	$ (2)						(2)
Liberty Expedia Holdings transaction, shares issued (in shares)					20,745,181
Liberty Expedia Holdings transaction, shares issued					$ 0			$ 2,883
Stock repurchases (in shares)	5,600,000								5,562,083	23,876,671
Stock repurchased, value	$ (683)								$ (683)	$ (3,212)
Liberty Expedia Holdings transaction		$ (329)
Treasury stock activity related to vesting of equity instruments (in shares)									295,185
Treasury stock activity related to vesting of equity instruments	(36)								$ (36)
Adjustment to the fair value of redeemable non-controlling interests	(14)										(14)
Other changes in non-controlling interests	22						1								21
Stock-based compensation expense	246						246
Ending Balance, shares issued (in shares) at Dec. 31, 2019				256,691,777		12,799,999			126,892,525
Ending Balance at Dec. 31, 2019	5,536			$ 0		$ 0	12,978		$ (9,673)		879		(217)		1,569
Net income (loss)	(2,728)										(2,612)				(116)
Other comprehensive income (loss), net of taxes	67												39		28
Payment of dividends to stockholders	(48)										(48)
Proceeds from exercise of equity instruments and employee stock purchase plans (in shares)				4,872,135
Proceeds from exercise of equity instruments and employee stock purchase plans	319			$ 0			319
Payment of preferred dividends (declared at $62.47 per share)	$ (75)						(75)
Stock repurchases (in shares)	3,400,000								3,364,119
Stock repurchased, value	$ (370)								$ (370)
Common stock warrants, net of issuance costs	110						110
Treasury stock activity related to vesting of equity instruments (in shares)									489,263
Treasury stock activity related to vesting of equity instruments	(54)								$ (54)
Adjustment to the fair value of redeemable non-controlling interests	4						4
Other changes in non-controlling interests	17						4								13
Stock-based compensation expense	225						225
Other (in shares)									20,630
Other	1						1
Ending Balance, shares issued (in shares) at Dec. 31, 2020				261,563,912		12,799,999			130,766,537
Ending Balance at Dec. 31, 2020	$ 3,004			$ 0		$ 0	$ 13,566		$ (10,097)		$ (1,781)		$ (178)		$ 1,494