Supplemental Consolidated Financial Information - Equity Method Investments and Warrants (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	$ (23)	$ (245)	$ (263)	$ (85)
Change in fair value of warrant	(174)	31	(25)	69
Fair value of Aurelia option	(109)	0	(109)	0
Loss on equity investments and warrant, net	(222)	(214)	(319)	(16)
Adevinta
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	0	(210)	(234)	(36)
Realized gain on sale of equity securities	84	0	78	0
Gmarket
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	(22)	(29)	(28)	(40)
KakaoBank
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	0	(4)	0	(7)
Adevinta Deal Expenses
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	$ (1)	$ (2)	$ (1)	$ (2)

Balance Sheet Components [Line Items]

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
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-Section 50
-Paragraph 4
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Amount of expense (income) related to adjustment to fair value of warrant liability.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
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