Fair Value Option - Gains (Losses) Related to Borrower-specific Credit Risk (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Loans reported as trading account assets | |||
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option | $ 24 | $ 7 | $ 37 |
| Consumer and commercial loans | |||
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option | 36 | (53) | (200) |
| Loans held-for-sale | |||
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option | $ (22) | $ (34) | $ 37 |
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- Definition This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans and other receivables held as assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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