Discontinued Operations - Summary of Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Classifieds | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents		$ 23
Accounts receivable, net		117
Other current assets		30
Long-term investments		32
Property and equipment, net		31
Goodwill		465
Intangible assets, net		35
Operating lease right-of-use assets		20
Deferred tax assets		435
Total assets classified as discontinued operations in the condensed consolidated balance sheet		1,188
Accounts payable		18
Accrued expenses and other current liabilities		104
Deferred revenue		4
Income taxes payable		35
Operating lease liabilities		11
Deferred tax liabilities		278
Other liabilities		2
Total liabilities classified as discontinued operations in the condensed consolidated balance sheet		452
eBay Korea | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 352	327
Short-term investments	0	6
Accounts receivable, net	54	50
Customer accounts and funds receivable	542	649
Other current assets	87	45
Property and equipment, net	63	66
Goodwill	376	390
Operating lease right-of-use assets	61	79
Deferred tax assets	22	9
Other assets	13	14
Total assets classified as discontinued operations in the condensed consolidated balance sheet	1,570	1,626
Short-term debt	8	12
Accounts payable	64	54
Customer accounts and funds payable	578	673
Accrued expenses and other current liabilities	77	91
Deferred revenue	10	12
Income taxes payable	120	13
Operating lease liabilities	46	64
Deferred tax liabilities	22
Long-term debt	0	5
Other liabilities	5	3
Total liabilities classified as discontinued operations in the condensed consolidated balance sheet	$ 930	$ 918