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v3.19.1

Risk and Capital Management - Summary of Implementation of Basel III Rules (Detail) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule for Implementation of Basel III Rules [Line Items] |  |  |
Common Equity Tier I |  | 4.50% | 4.50%
Tier I |  | 6.00% | 6.00%
Total Capital |  | 8.625% | 9.25%
Additional Common Equity Tier I (ACP) |  | 2.375% | 1.50%
Conservation |  | 1.875% | 1.25%
Countercyclical |  | 0.00% | 0.00%
Systemic |  | 0.50% | 0.25%
Common Equity Tier I + ACP |  | 6.875% | 6.00%
Total Capital + ACP |  | 11.00% | 10.75%
Prudential Adjustments Deductions |  | 100.00% | 80.00%
Events after reporting period [member] |  |  |
Schedule for Implementation of Basel III Rules [Line Items] |  |  |
Common Equity Tier I | 4.50% |  |
Tier I | 6.00% |  |
Total Capital | 8.00% |  |
Additional Common Equity Tier I (ACP) | 3.50% |  |
Conservation | 2.50% |  |
Countercyclical | 0.00% |  |
Systemic | 1.00% |  |
Common Equity Tier I + ACP | 8.00% |  |
Total Capital + ACP | 11.50% |  |
Prudential Adjustments Deductions | 100.00% |  |

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- Definition Capital risk weighted assets percentage. + References No definition available. + Details
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- Definition Conservation percentage of risk weighted assets. + References No definition available. + Details
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- Definition Tier one capital percentage of risk weighted assets. + References No definition available. + Details
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- Details
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