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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
ASSETS MEASURED ON A NONRECURRING BASIS |  |
Collateral-dependent loans | $ 64 | $ 108
Loans held for sale | 8 | 0
Accrued income and other assets | 72 | 56
Total assets at fair value | 144 | 164
Level 1 |  |
ASSETS MEASURED ON A NONRECURRING BASIS |  |
Collateral-dependent loans | 0 | 0
Loans held for sale | 0 | 0
Accrued income and other assets | 0 | 0
Total assets at fair value | 0 | 0
Level 2 |  |
ASSETS MEASURED ON A NONRECURRING BASIS |  |
Collateral-dependent loans | 0 |
Loans held for sale | 0 |
Accrued income and other assets | 0 |
Total assets at fair value | 0 | 0
Level 3 |  |
ASSETS MEASURED ON A NONRECURRING BASIS |  |
Collateral-dependent loans | 64 | 108
Loans held for sale | 8 | 0
Accrued income and other assets | 72 | 56
Total assets at fair value | $ 144 | $ 164

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- Definition Impaired loans fair value disclosure. + References No definition available. + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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