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Capital - Actual Capital Amounts and Ratios for Commercial Bank in Comparison With Minimum Amounts and Ratios Required (Detail) - Bank - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Common Equity, Tier 1 Amount |  |
Total regulatory capital, Common Equity, Tier 1 Amount | $ 7,653 | $ 5,217
Minimum for capital adequacy purposes, Common Equity, Tier 1 Amount | 3,142 | 1,964
Excess, Common Equity, Tier 1 Amount | $ 4,511 | $ 3,253
Common Equity, Tier 1 Ratio |  |
Total regulatory capital, Common Equity, Tier 1 Ratio | 10.96% | 11.95%
Minimum for capital adequacy purposes, Common Equity, Tier 1 Ratio | 4.50% | 4.50%
Excess, Common Equity, Tier 1 Ratio | 6.46% | 7.45%
Risk-Based Capital, Tier 1 Amount |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Amount | $ 7,653 | $ 5,217
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Amount | 4,189 | 2,619
Excess, Risk-Based Capital, Tier 1 Amount | $ 3,464 | $ 2,598
Risk-Based Capital, Tier 1 Ratio |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Ratio | 0.1096 | 0.1195
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Ratio | 0.0600 | 0.0600
Excess, Risk-Based Capital, Tier 1 Ratio | 0.0496 | 0.0595
Risk-Based Capital, Total Amount |  |
Total regulatory capital, Risk-Based Capital, Total Amount | $ 7,982 | $ 5,402
Minimum for capital adequacy purposes, Risk-Based Capital, Total Amount | 5,585 | 3,491
Excess, Risk-Based Capital, Total Amount | $ 2,397 | $ 1,911
Risk-Based Capital, Total Ratio |  |
Total regulatory capital, Risk-Based Capital, Total Ratio | 0.1143 | 0.1238
Minimum for capital adequacy purposes, Risk-Based Capital, Total Ratio | 0.0800 | 0.0800
Excess, Risk-Based Capital, Total Ratio | 0.0343 | 0.0438
Leverage Capital, Amount |  |
Total regulatory capital, Leverage Capital, Amount | $ 7,653 | $ 5,217
Minimum for capital adequacy purposes, Leverage Capital, Amount | 2,817 | 2,236
Excess, Leverage Capital, Amount | $ 4,836 | $ 2,981
Leverage Capital, Ratio |  |
Total regulatory capital, Leverage Capital, Ratio | 0.1087 | 0.0933
Minimum for capital adequacy purposes, Leverage Capital, Ratio | 0.0400 | 0.0400
Excess, Leverage Capital, Ratio | 0.0687 | 0.0533

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