Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Billions |
Sep. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Total commitments to originate loans | $ 4.0 | $ 5.2 |
| Total commitments related to derivatives | $ 4.1 | $ 5.5 |
| X | ||||||||||
- Definition Commitments to fund derivatives. No definition available.
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| X | ||||||||||
- Definition Commitments to purchase and fund mortgage loans. No definition available.
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| X | ||||||||||
- References No definition available.
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