Investments in Unconsolidated Affiliates (Details) - USD ($)		12 Months Ended
	Jun. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates		$ 2,262,000,000	$ 2,403,000,000
Net pre-tax gain		(15,000,000)	220,000,000	$ 100,000,000
Tax expense		754,000,000	551,000,000	363,000,000
Cash distributions from unconsolidated affiliate		191,000,000	211,000,000	149,000,000
Distributions from unconsolidated affiliates		136,000,000	138,000,000	115,000,000
Equity securities without readily determinable fair value		156,000,000	135,000,000
Ondot
Schedule of Equity Method Investments [Line Items]
Pre-tax gain from remeasurement				12,000,000
Line of Credit | Revolving Credit Facility
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity		6,000,000,000
Line of Credit | Variable-Rate Term Loan Facilities Due April 2027 | Term Loan Facilities
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity		437,000,000
Line of Credit | Variable-Rate Revolving Credit Facilities Due April 2027 | Revolving Credit Facility
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity		83,000,000
Outstanding debt		24,000,000
Sagent
Schedule of Equity Method Investments [Line Items]
Net pre-tax gain			80,000,000
Tax expense			19,000,000
Lending Joint Ventures
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates		55,000,000	72,000,000
Other Strategic Investments
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates		254,000,000	257,000,000
InvestCloud Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Net pre-tax gain				28,000,000
Tax expense				6,000,000
Capital contribution				200,000,000
InvestCloud Holdings, LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Tax expense				8,000,000
Proceeds from sale of entire ownership interest	$ 466,000,000
Pre-tax gain on sale				$ 33,000,000
Merchant Alliances
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates		$ 1,900,000,000	$ 2,100,000,000