Outstanding Loans and Leases - Rollforward of Accretable Yield (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Rollforward of Accretable Yield | ||||
| Accretable yield, beginning of period | $ 2,730 | $ 2,789 | ||
| Accretion | (124) | (254) | ||
| Disposals/transfers | (105) | (212) | ||
| Reclassifications from nonaccretable difference | 57 | 235 | ||
| Accretable yield, end of period | 2,558 | 2,558 | ||
| Purchased credit impaired loans sold | $ 51 | $ 204 | $ 160 | $ 204 |
| X | ||||||||||
- Definition Certain loans acquired in transfer not accounted for as debt securities Accretable yield disposals transfers. No definition available.
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| X | ||||||||||
- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of reduction, resulting from a sale or transfer of a loan, in the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition Amount of reclassification (to) from nonaccretable difference (from) to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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