This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of investment in equity security without readily determinable fair value.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Investments (Details) - USD ($) $ in Millions	3 Months Ended
Investments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023	Feb. 29, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Gains (losses) from equity method investments	$ (3)	$ 0
Equity securities without readily determinable fair value, amount	84
Options Clearing Corporation
Schedule of Equity Method Investments [Line Items]
Gains (losses) from equity method investments	$ 42	$ 35
Ownership percentage	40.00%
Bakkt
Schedule of Equity Method Investments [Line Items]
Ownership percentage	55.00%			64.00%
Aggregate cost			$ 10
Payments for investments	$ 2
Carrying value of investments	14
Equity securities without readily determinable fair value, amount	$ 82