Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	$ 7,866	$ 6,184	$ 22,303	$ 17,822
Total segment adjusted EBITDA	343	239	954	780
Reconciling items:
Interest expense	(36)	(13)	(100)	(34)
Interest income	55	50	163	124
Other income (expense), net	4	(8)	7	(20)
Income before income taxes	132	117	194	412
Operating segments | Product Commerce
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	6,891	5,966	19,816	17,306
Total segment adjusted EBITDA	470	399	1,467	1,095
Operating segments | Developing Offerings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	975	218	2,487	516
Total segment adjusted EBITDA	(127)	(161)	(513)	(316)
Segment reconciling items
Reconciling items:
Depreciation and amortization	(112)	(67)	(313)	(198)
Equity-based compensation	(114)	(84)	(311)	(240)
Acquisition and restructuring related costs	(8)	0	(85)	0
KFTC administrative fine (see Note 10)	0	0	(121)	0
Interest expense	(36)	(13)	(100)	(34)
Interest income	55	50	163	124
Other income (expense), net	$ 4	$ (8)	$ 7	$ (20)