Investment Securities Additional Information (Details) - USD ($) $ in Millions			12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivable	$ 215	$ 207
Proceeds from sales			$ 2,570	$ 2,776	$ 812
Debt Securities, Available-for-sale, Realized Gain (Loss)			(9)	2	25
Security Owned and Pledged as Collateral, Associated Liabilities, Fair Value	21,300	20,800	21,300	20,800
Securities Received as Collateral	$ 82	$ 1	82	1
Debt Securities, Available-for-Sale, Realized Gain			$ 1	$ 10	$ 25

Amount of interest income on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), from change in present value of expected cash flows, attributable to passage of time.

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.

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Fair value of liabilities arising from or related to a financial instrument held by the entity for its own account (proprietary securities) which has been pledged to counterparties.

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