Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Restricted cash and cash equivalents | $ 991 | $ 596 |
| Mortgages held-for-sale, fair value disclosure | 15,035 | 23,106 |
| Allowance for loan losses | (4,234) | (6,139) |
| Other Assets at fair value | 4,627 | 3,929 |
| Debt securities recorded at fair value | 3,938 | 5,112 |
| Senior preferred stock, at redemption value | $ 79,322 | $ 75,648 |
| Common Stock, No Par Value | $ 0 | $ 0 |
| Common Stock, Shares Authorized | 4,000,000,000 | 4,000,000,000 |
| Common Stock, Shares, Issued | 725,863,886 | 725,863,886 |
| Common Stock, Shares, Outstanding | 650,059,033 | 650,058,775 |
| Available for sale securities other-than-temporary impairment adjustment, related to net unrealized gains(losses) on securities for which other-than-temporary impairment has been recognized in earnings | $ 222 | $ 221 |
| Treasury Stock, Shares | 75,804,853 | 75,805,111 |