| Amount, after allowance for bad debt, of commercial mortgage loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Commercial, Real Estate (Deprecated 2019-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |