Consolidated Statement of Equity - USD ($) $ in Millions	Common Series A Common stock	Additional paid-in capital	Parent's Investment	Accumulated other comprehensive earnings (loss)	Retained earnings (accumulated deficit)	Noncontrolling Interest in equity of subsidiaries	Total
Beginning Balance at Dec. 31, 2014			$ 619	$ (16)	$ (215)	$ 2	$ 390
Net earnings (loss)					281	1	282
Other comprehensive earnings (loss)				(17)			(17)
Contributions from (distributions to) former parent, net			51				51
Acquisition of noncontrolling interest			(31)			(3)	(34)
Ending Balance at Dec. 31, 2015			639	(33)	66		672
Net earnings (loss)					2,292	(220)	2,072
Other comprehensive earnings (loss)						(192)	(192)
Stock-based compensation		$ 8				40	48
Contributions from (distributions to) former parent, net		(299)	(17)				(316)
Change in capitalization in connection with Expedia Holdings Split-Off	$ 1	621	$ (622)
Proceeds from exercise of equity instruments and employee stock purchase plan		(2)				17	15
Shares repurchased by subsidiary		7				(96)	(89)
Tax attributes in connection with the Expedia Holdings Split-Off		70					70
Proceeds related to trivago initial public offering, net of fees and expenses		20				190	210
Adjustments to fair value of redeemable noncontrolling interests					13	75	88
Change in ownership of noncontrolling interest related to trivago initial public offering		(5)		1		4
Additional non-controlling interest in connection with business combination						16,362	16,362
Transfer to non-redeemable non-controlling interests						1,381	1,381
Dividends paid to noncontrolling interest						(32)	(32)
Other		3					3
Ending Balance at Dec. 31, 2016	1	423		(32)	2,371	17,529	20,292
Net earnings (loss)							(2,005)
Net earnings (loss) excluding net income attributable to redeemable noncontrolling interest					(192)	(1,815)	(2,007)
Other comprehensive earnings (loss)				91		662	753
Stock-based compensation		33				95	128
Change in capitalization in connection with Expedia Holdings Split-Off		6					6
Tax attributes in connection with the Expedia Holdings Split-Off		(82)				310	228
Change in ownership of noncontrolling interest related to trivago initial public offering		(9)					(9)
Transfer to non-redeemable non-controlling interests						167	167
Acquisition of noncontrolling interest		(2)				(310)	(312)
Dividends paid to noncontrolling interest						(149)	(149)
Other		1				4	5
Ending Balance at Dec. 31, 2017	$ 1	$ 370		$ 59	$ 2,179	$ 16,493	$ 19,102