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Supplemental Consolidated Financial Information - Schedule of Equity Method Investments and Warrants (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	$ (9)	$ 19	$ (17)	$ (244)
Change in fair value of warrants	2	145	2	120
Change in fair value of Aurelia option	0	35	0	(74)
Gain (loss) on equity investments and warrant, net	(10)	199	(16)	(120)
Adevinta
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	0	0	0	(234)
Realized change in fair value of shares sold in Adevinta	0	0	0	78
Gmarket
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	0	16	0	(12)
Gain (loss) on other investments
Balance Sheet Components [Line Items]
Unrealized change in fair value of equity investment	$ (12)	$ 3	$ (18)	$ 2

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