Segments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	1
Number of reportable segments | segment	1
Segment Reporting Information [Line Items]
Total net transaction revenues	$ 2,023	$ 1,815
Total marketing services and other revenues	557	488
Total net revenues	2,580	2,303
Marketplace
Segment Reporting Information [Line Items]
Total net transaction revenues	1,792	1,609
Total marketing services and other revenues	310	283
StubHub
Segment Reporting Information [Line Items]
Total net transaction revenues	231	206
Classifieds
Segment Reporting Information [Line Items]
Total marketing services and other revenues	246	199
StubHub, Corporate and other
Segment Reporting Information [Line Items]
Total marketing services and other revenues	1	6
U.S.
Segment Reporting Information [Line Items]
Total net revenues	1,074	990
United Kingdom
Segment Reporting Information [Line Items]
Total net revenues	356	311
Germany
Segment Reporting Information [Line Items]
Total net revenues	392	331
South Korea
Segment Reporting Information [Line Items]
Total net revenues	283	245
Rest of world
Segment Reporting Information [Line Items]
Total net revenues	$ 475	$ 426