Discontinued Operations - Summary of Financial Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income taxes	$ 6	$ 2	$ 2,933	$ 4
StubHub
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	264	100	494
Cost of net revenues	0	77	31	139
Gross profit	0	187	69	355
Sales and marketing	0	129	51	224
Product development	0	27	29	52
General and administrative	0	18	33	43
Provision for transaction losses	0	8	3	13
Amortization of acquired intangible assets	0	2	1	4
Amortization of acquired intangible assets	0	184	117	336
Income (loss) from operations of discontinued operations	0	3	(48)	19
Pre-tax gain on sale	0	0	3,876	0
Income from discontinued operations before income taxes	0	3	3,828	19
Income tax benefit (provision)	7	0	(893)	(11)
Income from discontinued operations, net of income taxes	7	3	2,935	8
Paypal and Enterprise
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income taxes	$ (1)	$ (1)	$ (2)	$ (4)