Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) segment	Jun. 30, 2016 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Number of reportable segments | segment			1
Segment Reporting Information [Line Items]
Total net transaction revenues	$ 1,817	$ 1,746	$ 3,546	$ 3,423
Total marketing services and other revenues	511	484	999	944
Total net revenues	2,328	2,230	4,545	4,367
Marketplace
Segment Reporting Information [Line Items]
Total net transaction revenues	1,590	1,521	3,115	3,021
Total marketing services and other revenues	283	277	566	551
StubHub
Segment Reporting Information [Line Items]
Total net transaction revenues	227	225	431	402
Classifieds
Segment Reporting Information [Line Items]
Total marketing services and other revenues	219	207	418	393
StubHub, Corporate and other
Segment Reporting Information [Line Items]
Total marketing services and other revenues	$ 9	$ 0	$ 15	$ 0