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Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | --- | ---
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | $ 81,423 | $ 79,213 |
Loans held for sale | 1,100 | 251 |
Derivative assets, gross amount | 6,617 | 1,729 |
Derivative asset, netting adjustments | (3,567) | (633) |
Derivative asset | 3,050 | 1,096 |
Liabilities: |  |  |
Derivative liabilities, gross amount | 3,884 | 1,197 |
Derivative liability, netting adjustments | (1,127) | (523) |
Derivative liability | 2,757 | 674 |
Net valuation allowance | 19 | 12 |
Level 1 |  |  |
Assets: |  |  |
Loans held for sale |  | 0 |
Level 2 |  |  |
Assets: |  |  |
Loans held for sale |  | 149 |
Level 3 |  |  |
Assets: |  |  |
Loans held for sale |  | 0 |
Recurring |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 81,423 | 79,213 |
Loans held for sale | 1,056 | 251 |
Derivative asset | 3,050 | 1,096 |
Other assets | 360 | 410 |
Total assets | 85,889 | 80,970 |
Liabilities: |  |  |
Derivative liability | 2,757 | 674 |
Recurring | Level 1 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 4,553 | 4,355 |
Loans held for sale | 0 | 0 |
Derivative assets, gross amount | 589 | 84 |
Other assets | 301 | 344 |
Total assets | 5,443 | 4,783 |
Other assets: |  |  |
Deferred compensation plan assets | 300 | 343 |
Equity securities | 1 | 1 |
Liabilities: |  |  |
Derivative liabilities, gross amount | 361 | 17 |
Recurring | Level 2 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 76,461 | 74,416 |
Loans held for sale | 1,056 | 251 |
Derivative assets, gross amount | 5,881 | 1,568 |
Other assets | 0 | 0 |
Total assets | 83,398 | 76,235 |
Liabilities: |  |  |
Derivative liabilities, gross amount | 3,442 | 1,129 |
Recurring | Level 3 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 409 | 442 |
Loans held for sale | 0 | 0 |
Derivative assets, gross amount | 147 | 77 | $ 42
Other assets | 59 | 66 |
Total assets | 615 | 585 |
Other assets: |  |  |
Retained interests in securitizations | 59 | 66 |
Liabilities: |  |  |
Derivative liabilities, gross amount | 81 | 51 | $ 36
U.S. Treasury securities |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 4,360 | 4,124 |
U.S. Treasury securities | Recurring |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 4,360 | 4,124 |
U.S. Treasury securities | Recurring | Level 1 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 4,360 | 4,124 |
U.S. Treasury securities | Recurring | Level 2 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 0 | 0 |
U.S. Treasury securities | Recurring | Level 3 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 0 | 0 |
RMBS |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 65,741 | 64,338 |
RMBS | Recurring |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 65,741 | 64,338 |
RMBS | Recurring | Level 1 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 0 | 0 |
RMBS | Recurring | Level 2 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 65,368 | 63,909 |
RMBS | Recurring | Level 3 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 373 | 429 |
CMBS | Recurring |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 10,084 | 9,426 |
CMBS | Recurring | Level 1 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 0 | 0 |
CMBS | Recurring | Level 2 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 10,048 | 9,413 |
CMBS | Recurring | Level 3 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 36 | 13 |
Other securities |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 1,238 | 1,325 |
Other securities | Recurring |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 1,238 | 1,325 |
Other securities | Recurring | Level 1 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 193 | 231 |
Other securities | Recurring | Level 2 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | 1,045 | 1,094 |
Other securities | Recurring | Level 3 |  |  |
Assets: |  |  |
Securities available for sale (amortized cost of $78.6 billion and allowance for credit losses of $5 million as of March 31, 2020) | $ 0 | $ 0 |

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