Investments (Details) - USD ($)	4 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 12, 2024	Feb. 29, 2024	May 20, 2022	May 19, 2022
Schedule of Equity Method Investments [Line Items]
Proceeds from the sale of equity investments		$ 0	$ 187,000,000	$ 741,000,000
Gain (loss) on equity method investments		(62,000,000)	(122,000,000)	(1,340,000,000)
Assets	$ 136,084,000,000	139,428,000,000	136,084,000,000
Liabilities	110,298,000,000	111,708,000,000	110,298,000,000
Total revenues		11,761,000,000	9,903,000,000	9,636,000,000
Net loss		(2,754,000,000)	(2,368,000,000)	(1,446,000,000)
Revolving Credit Facility
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity		3,900,000,000
Revolving Credit Facility | Bakkt Credit Facility | Line of Credit
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity					$ 40,000,000
Total debt outstanding		$ 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Assets	455,000,000		455,000,000
Liabilities	119,000,000		119,000,000
Total revenues			55,000,000
Net loss			2,000,000,000
Dun & Bradstreet
Schedule of Equity Method Investments [Line Items]
Proceeds from the sale of equity investments	187,000,000
Gain (loss) on sale of equity method investment	$ (3,000,000)
Euroclear
Schedule of Equity Method Investments [Line Items]
Gain (loss) on sale of equity method investment			41,000,000
Ownership percentage (in percentage)							9.80%	9.80%
Aggregate cost								$ 631,000,000
Carrying value of investments							$ 700,000,000
Options Clearing Corporation
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in percentage)		40.00%
Gain (loss) on equity method investments		$ 62,000,000	$ 122,000,000	$ 1,300,000,000
Bakkt, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in percentage)	64.00%	54.00%	64.00%
Aggregate cost						$ 10,000,000
Fair value of investments		$ 185,000,000
Gain (loss) on equity method investments			$ (1,400,000,000)