Guarantor and Non-Guarantor Supplemental Financial Information - Schedule of Statement of Operations (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Condensed Income Statements, Captions [Line Items]
Revenue		$ 2,609	$ 2,508
Cost of revenue	[1]	513	487
Selling and marketing	[1]	1,535	1,516
Technology and content	[1]	429	396
General and administrative	[1]	191	199
Amortization of intangible assets		52	72
Legal reserves, occupancy tax and other		10	3
Restructuring and related reorganization charges		10	0
Intercompany (income) expense, net		0	0
Operating loss		(131)	(165)
Equity in pre-tax earnings of consolidated subsidiaries		0	0
Other, net		(10)	(4)
Total other expense, net		(10)	(4)
Income (loss) before income taxes		(141)	(169)
Provision for income taxes		41	20
Net income (loss)		(100)	(149)
Net (income) loss attributable to noncontrolling interests		(3)	12
Net income (loss) attributable to Expedia, Inc.		(103)	(137)
Comprehensive income (loss) attributable to Expedia, Inc.		(100)	(110)
Reportable Legal Entities | Parent
Condensed Income Statements, Captions [Line Items]
Revenue		0	0
Cost of revenue		0	0
Selling and marketing		0	0
Technology and content		0	0
General and administrative		0	0
Amortization of intangible assets		0	0
Legal reserves, occupancy tax and other		0	0
Restructuring and related reorganization charges		0
Intercompany (income) expense, net		0	0
Operating loss		0	0
Equity in pre-tax earnings of consolidated subsidiaries		(72)	(97)
Other, net		(40)	(52)
Total other expense, net		(112)	(149)
Income (loss) before income taxes		(112)	(149)
Provision for income taxes		9	12
Net income (loss)		(103)	(137)
Net (income) loss attributable to noncontrolling interests		0	0
Net income (loss) attributable to Expedia, Inc.		(103)	(137)
Comprehensive income (loss) attributable to Expedia, Inc.		(100)	(110)
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenue		2,058	1,911
Cost of revenue		376	366
Selling and marketing		1,150	1,048
Technology and content		294	280
General and administrative		107	118
Amortization of intangible assets		30	45
Legal reserves, occupancy tax and other		11	3
Restructuring and related reorganization charges		0
Intercompany (income) expense, net		212	184
Operating loss		(122)	(133)
Equity in pre-tax earnings of consolidated subsidiaries		(29)	(16)
Other, net		52	52
Total other expense, net		23	36
Income (loss) before income taxes		(99)	(97)
Provision for income taxes		27	3
Net income (loss)		(72)	(94)
Net (income) loss attributable to noncontrolling interests		1	1
Net income (loss) attributable to Expedia, Inc.		(71)	(93)
Comprehensive income (loss) attributable to Expedia, Inc.		(80)	(51)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenue		638	721
Cost of revenue		143	126
Selling and marketing		466	587
Technology and content		135	116
General and administrative		84	81
Amortization of intangible assets		22	27
Legal reserves, occupancy tax and other		(1)	0
Restructuring and related reorganization charges		10
Intercompany (income) expense, net		(212)	(184)
Operating loss		(9)	(32)
Equity in pre-tax earnings of consolidated subsidiaries		0	0
Other, net		(22)	(4)
Total other expense, net		(22)	(4)
Income (loss) before income taxes		(31)	(36)
Provision for income taxes		5	5
Net income (loss)		(26)	(31)
Net (income) loss attributable to noncontrolling interests		(4)	11
Net income (loss) attributable to Expedia, Inc.		(30)	(20)
Comprehensive income (loss) attributable to Expedia, Inc.		(38)	24
Eliminations
Condensed Income Statements, Captions [Line Items]
Revenue		(87)	(124)
Cost of revenue		(6)	(5)
Selling and marketing		(81)	(119)
Technology and content		0	0
General and administrative		0	0
Amortization of intangible assets		0	0
Legal reserves, occupancy tax and other		0	0
Restructuring and related reorganization charges		0
Intercompany (income) expense, net		0	0
Operating loss		0	0
Equity in pre-tax earnings of consolidated subsidiaries		101	113
Other, net		0	0
Total other expense, net		101	113
Income (loss) before income taxes		101	113
Provision for income taxes		0	0
Net income (loss)		101	113
Net (income) loss attributable to noncontrolling interests		0	0
Net income (loss) attributable to Expedia, Inc.		101	113
Comprehensive income (loss) attributable to Expedia, Inc.		$ 118	$ 27

[1] (1) Includes stock-based compensation as follows: Cost of revenue$3 $2Selling and marketing11 11Technology and content19 15General and administrative23 22