Segment Reporting - Schedule of Segment Information by Geography (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues, less transaction-based expenses:	$ 7,988	$ 7,292	$ 7,146
Net assets	25,786	22,761
Property and equipment, net	1,923	1,767
United States
Segment Reporting Information [Line Items]
Revenues, less transaction-based expenses:	5,246	4,867	4,832
Net assets	18,327	15,226
Property and equipment, net	1,688	1,598
Foreign Countries
Segment Reporting Information [Line Items]
Revenues, less transaction-based expenses:	2,742	2,425	$ 2,314
Net assets	7,459	7,535
Property and equipment, net	$ 235	$ 169