Credit Concentrations - Additional Information (Detail) - USD ($) $ in Millions |
Jun. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Concentration Risk [Line Items] | ||
| Cash deposits held at central banks | $ 202,200 | $ 116,630 |
| GS Bank USA [Member] | ||
| Concentration Risk [Line Items] | ||
| Cash deposits held at the Federal Reserve Bank of New York | $ 133,090 | $ 52,710 |