Fiduciary Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Billions |
Jun. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Fiduciary Assets And Liabilities [Abstract] | ||
| Fiduciary liabilities current | $ 2.3 | $ 2.0 |
| X | ||||||||||
- Definition Fiduciary assets and liabilities. No definition available.
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| X | ||||||||||
- Definition Fiduciary liabilities current. No definition available.
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