Balance Sheet Components - Customer Accounts and Funds Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Components [Abstract]
Cash and cash equivalents	$ 3	$ 0
Funds receivable	564	290
Customer accounts and funds receivable	$ 567	$ 290

These balances represent payments in transit and cash received and held by financial institutions and payment processors associated with marketplace activity and awaiting settlement or are installment collections from financial institutions

No definition available.

Name:	ebay_CustomerAccountsAndFundsReceivableCurrent
Namespace Prefix:	ebay_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant