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Investments - Equity Method Investment in Adevinta (Details) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Nov. 18, 2021 USD ($) shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Jun. 24, 2021 USD ($)
Schedule of Investments [Line Items]
Unrealized loss on equity securities		$ 77		$ 259
Equity investment in Adevinta		2,919		$ 2,919		$ 5,391
Adevinta
Schedule of Investments [Line Items]
Ownership percentage	25.00%						44.00%
Equity investment under fair value option							$ 10,800
Ownership percentage after sale				33.00%
Voting rights, conversion ratio							1
Unrealized loss on equity securities		829	$ 422	$ 2,472	$ 422
Equity investment in Adevinta		$ 2,919		$ 2,919		$ 5,391
Adevinta | Maximum
Schedule of Investments [Line Items]
Limitation on voting interest that can be held (as a percent)							33.00%
Adevinta | Permira
Schedule of Investments [Line Items]
Number of voting shares sold | shares	135
Total consideration from sale of equity securities	$ 2,300

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