Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	$ 7,323	$ 5,838	$ 14,437	$ 11,638
Total segment adjusted EBITDA	330	300	611	541
Reconciling items:
Estimated KFTC administrative fine (see Note 10)	(121)	0	(121)	0
Interest expense	(37)	(13)	(64)	(21)
Interest income	53	42	108	73
Other income (expense), net	12	(6)	3	(11)
Income before income taxes	3	171	62	295
Operating segments | Product Commerce
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	6,431	5,682	12,925	11,340
Total segment adjusted EBITDA	530	408	997	696
Operating segments | Developing Offerings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	892	156	1,512	298
Total segment adjusted EBITDA	(200)	(107)	(386)	(155)
Segment reconciling items
Reconciling items:
Depreciation and amortization	(106)	(66)	(201)	(130)
Equity-based compensation	(109)	(86)	(197)	(156)
Acquisition and restructuring related costs	(19)	0	(77)	0
Interest expense	(37)	(13)	(64)	(21)
Interest income	53	42	108	73
Other income (expense), net	$ 12	$ (6)	$ 3	$ (11)