The Company and Summary of Significant Accounting Policies - The Company (Details) $ / shares in Units, shares in Millions, $ in Millions, ₩ in Billions				3 Months Ended	12 Months Ended
	Jul. 14, 2021 USD ($) $ / shares shares	Jun. 24, 2021 USD ($) shares	Jul. 20, 2020 USD ($) shares	Dec. 31, 2021	Jun. 30, 2022 USD ($)	Jun. 30, 2022 KRW (₩)	Sep. 30, 2021	Jul. 12, 2021	Jun. 30, 2021
Adevinta
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Ownership percentage		44.00%					44.00%
Percentage of voting shares acquired		33.00%
Percentage of non-voting shares acquired		11.00%
Discount rate on 10-day VWAP								7.00%
Discount rate on 30-day VWAP								5.00%
Adevinta | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Ownership percentage after sale				33.00%
Adevinta | Permira
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of shares in equity investment | shares	125
Total consideration in sale of equity investment	$ 2,250
Purchase price per share (in usd per share) | $ / shares	$ 18.02
Sale of equity investment, option period	30 days
Number of additional shares in option to purchase | shares	10
Additional consideration in option to purchase	$ 180
Discontinued Operations, Disposed of by Sale | Classifieds
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sale of business		$ 2,500	$ 2,500
Number of shares received from the sale | shares		540	540
Amount of consideration received subject to adjustments		$ 13,300
Discontinued Operations, Held-for-sale | eBay Korea
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of equity interests to be sold									80.01%
Discontinued Operations, Held-for-sale | eBay Korea | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sale of business					$ 3,000	₩ 3,440
Ownership percentage after sale					19.99%	19.99%