The Company and Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2024 USD ($) market $ / shares	Mar. 31, 2023 USD ($) $ / shares	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2023	Nov. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of operating markets | market	190
Net income | $	$ 438	$ 567
Gain per share from revision of useful life, basic (in usd per share)	$ 0.85	$ 1.06
Gain per share from revision of useful life, diluted (in usd per share)	$ 0.85	$ 1.05
Service Life
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation expense decrease | $	$ 26
Net income | $	$ 21
Gain per share from revision of useful life, basic (in usd per share)	$ 0.04
Gain per share from revision of useful life, diluted (in usd per share)	$ 0.04
Software and Software Development Costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, useful life					4 years	3 years
Adevinta
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage after sale			33.00%
Gmarket
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage after sale				19.99%
Discontinued Operations, Disposed of by Sale | eBay Korea
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of outstanding equity interests sold				80.01%