Investments - Summarized Financial Information of Investment (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule Of Investments [Roll Forward]
Opening balance at beginning of period	$ 4,474
Unrealized change in fair value of equity investment	(246)	$ 160
Realized change in fair value of shares sold	0	0
Closing balance at end of period	4,240		$ 4,474
Adevinta
Schedule Of Investments [Roll Forward]
Opening balance at beginning of period	4,474
Unrealized change in fair value of equity investment	(234)	174
Closing balance at end of period	4,240		4,474
GMarket
Schedule Of Investments [Roll Forward]
Opening balance at beginning of period	335	$ 431	431
Unrealized change in fair value of equity investment	(6)		(96)
Closing balance at end of period	$ 329		$ 335