Consolidated Balance Sheet (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Cash and due from banks, allowance for credit loss	$ 28	$ 3
Interest-bearing deposits with banks, allowance for credit loss	2	2
Restricted cash	4,893	3,822
Debt securities, held-to-maturity, allowance for credit loss (less than)	1	1
Held-to-maturity, fair value	50,485	56,775
Debt securities, available-for-sale, amortized cost	93,619	100,774
Debt securities, available-for-sale, allowance for credit loss	9	10
Other assets, allowance for credit loss on accounts receivable	5	4
Other assets	1,599	1,187
Allowance for credit losses on lending related commitments	72	45
Other liabilities, fair value	$ 26	$ 496
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, issued (shares)	48,826	48,826
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, authorized (shares)	3,500,000,000	3,500,000,000
Common stock, issued (shares)	1,395,525,936	1,389,397,912
Treasury stock, common shares (shares)	587,245,987	585,252,546