Consolidated Balance Sheet (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Restricted cash	$ 5,000	$ 2,000
Debt securities, held-to-maturity, fair value	38,418	34,805
Debt securities, available-for-sale, allowance for credit loss	15
Debt securities, available-for-sale, amortized cost	99,503	87,435
Long-term debt, fair value	$ 397	$ 387
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)	35,826	35,826
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)	1,380,881,570	1,374,443,376
Treasury stock, common shares (shares)	495,438,749	473,760,338
Operating segments
Cash and due from banks, allowance for credit loss	$ 3
Interest-bearing deposits with banks, allowance for credit losses	1
Restricted cash	4,714	$ 2,437
Federal funds sold and securities purchased under resale agreements, allowance for credit losses	18
Debt securities, held-to-maturity, allowance for credit loss (less than)	1
Debt securities, held-to-maturity, fair value	38,418	34,805
Debt securities, available-for-sale, allowance for credit loss	15
Debt securities, available-for-sale, amortized cost	99,503	87,435
Other assets, allowance for credit loss on accounts receivable	4
Other assets, fair value	527	419
Allowance for credit losses on lending related commitments	148	94
Other liabilities, fair value	973	607
Long-term debt, fair value	$ 397	$ 387