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Capital - Actual Capital Amount and Ratios (Details) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 17, 2017
--- | --- | --- | ---
Total |  |  |
Excess, ratio | 0.0377 |  |
Leverage Capital |  |  |
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum | 0.0127 |  |
Fixed-to-Floating Rate Series A Noncumulative Perpetual Preferred Stock |  |  |
Leverage Capital |  |  |
Interest in preferred stock |  |  | 2.50%
Parent company |  |  |
Common Equity Tier 1 |  |  |
Total capital, amount | $ 8,009,000,000 | $ 6,335,000,000 |
Total capital, ratio | 0.0905 | 0.0906 |
Minimum for capital adequacy, amount | $ 3,983,000,000 | $ 3,146,000,000 |
Minimum for capital adequacy, ratio | 0.0450 | 0.0450 |
Excess, amount | $ 4,026,000,000 | $ 3,189,000,000 |
Excess, ratio | 4.55% | 4.56% |
Tier 1 |  |  |
Total capital, amount | $ 8,512,000,000 | $ 6,838,000,000 |
Total capital, ratio | 0.0962 | 0.0978 |
Minimum for capital adequacy, amount | $ 5,310,000,000 | $ 4,195,000,000 |
Minimum for capital adequacy, ratio | 0.0600 | 0.0600 |
Excess, amount | $ 3,202,000,000 | $ 2,643,000,000 |
Excess, ratio | 0.0362 | 0.0378 |
Total |  |  |
Total capital, amount | $ 10,415,000,000 | $ 8,154,000,000 |
Total capital, ratio | 0.1177 | 0.1166 |
Minimum for capital adequacy, amount | $ 7,081,000,000 | $ 5,593,000,000 |
Minimum for capital adequacy, ratio | 0.0800 | 0.0800 |
Excess, amount | $ 3,334,000,000 | $ 2,561,000,000 |
Excess, ratio | 0.0377 | 0.0366 |
Leverage Capital |  |  |
Total capital, amount | $ 8,512,000,000 | $ 6,838,000,000 |
Total capital, ratio | 0.0775 | 0.0970 |
Minimum for capital adequacy, amount | $ 4,392,000,000 | $ 2,819,000,000 |
Minimum for capital adequacy, ratio | 0.0400 | 0.0400 |
Excess, amount | $ 4,120,000,000 | $ 4,019,000,000 |
Excess, ratio | 3.75% | 5.70% |
Subsidiaries |  |  |
Common Equity Tier 1 |  |  |
Total capital, amount | $ 9,305,000,000 | $ 7,653,000,000 |
Total capital, ratio | 0.1052 | 0.1096 |
Minimum for capital adequacy, amount | $ 3,980,000,000 | $ 3,142,000,000 |
Minimum for capital adequacy, ratio | 0.0450 | 0.0450 |
Excess, amount | $ 5,325,000,000 | $ 4,511,000,000 |
Excess, ratio | 6.02% | 6.46% |
Tier 1 |  |  |
Total capital, amount | $ 9,305,000,000 | $ 7,653,000,000 |
Total capital, ratio | 0.1052 | 0.1096 |
Minimum for capital adequacy, amount | $ 5,307,000,000 | $ 4,189,000,000 |
Minimum for capital adequacy, ratio | 0.0600 | 0.0600 |
Excess, amount | $ 3,998,000,000 | $ 3,464,000,000 |
Excess, ratio | 0.0452 | 0.0496 |
Total |  |  |
Total capital, amount | $ 10,271,000,000 | $ 7,982,000,000 |
Total capital, ratio | 0.1161 | 0.1143 |
Minimum for capital adequacy, amount | $ 7,076,000,000 | $ 5,585,000,000 |
Minimum for capital adequacy, ratio | 0.0800 | 0.0800 |
Excess, amount | $ 3,195,000,000 | $ 2,397,000,000 |
Excess, ratio | 0.0361 | 0.0343 |
Leverage Capital |  |  |
Total capital, amount | $ 9,305,000,000 | $ 7,653,000,000 |
Total capital, ratio | 0.0848 | 0.1087 |
Minimum for capital adequacy, amount | $ 4,389,000,000 | $ 2,817,000,000 |
Minimum for capital adequacy, ratio | 0.0400 | 0.0400 |
Excess, amount | $ 4,916,000,000 | $ 4,836,000,000 |
Excess, ratio | 4.48% | 6.87% |

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