Discontinued Operations - Summary of Financial Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ 43	$ 100	$ 3,061	$ 183
StubHub
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	306	100	800
Cost of net revenues	0	76	31	215
Gross profit	0	230	69	585
Sales and marketing	0	148	51	372
Product development	(2)	33	27	85
General and administrative	0	22	33	65
Provision for transaction losses	0	4	3	17
Amortization of acquired intangible assets	0	3	1	7
Total operating expenses	(2)	210	115	546
Income (loss) from operations of discontinued operations	2	20	(46)	39
Pre-tax gain (loss) on sale	(8)	0	3,868	0
Income (loss) from discontinued operations before income taxes	(6)	20	3,822	39
Income tax benefit (provision)	2	(1)	(891)	(12)
Income (loss) from discontinued operations, net of income taxes	(4)	19	2,931	27
Classifieds
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	263	260	705	779
Cost of net revenues	27	21	76	63
Gross profit	236	239	629	716
Sales and marketing	72	81	220	262
Product development	44	37	118	112
General and administrative	36	11	98	45
Provision for transaction losses	3	4	13	8
Amortization of acquired intangible assets	2	2	6	9
Total operating expenses	157	135	455	436
Income (loss) from operations of discontinued operations	79	104	174	280
Pre-tax gain (loss) on sale	(1)	0	1	(1)
Income (loss) from discontinued operations before income taxes	78	104	175	279
Income tax benefit (provision)	(31)	(23)	(43)	(119)
Income (loss) from discontinued operations, net of income taxes	47	81	132	160
Paypal and Enterprise
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ 0	$ 0	$ (2)	$ (4)