Investment Securities Additional Information (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivable	$ 224	$ 215
Proceeds from sales			$ 0	$ 1,800	$ 0	$ 2,240
Debt Securities, Available-for-sale, Realized Gain (Loss)			0	$ (6)	0	$ (6)
Security Owned and Pledged as Collateral, Associated Liabilities, Fair Value	47,100	21,300	47,100		47,100
Securities Received as Collateral	$ 66	$ 82	$ 66		$ 66