| Standard label: | Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount |
| Name: | us-gaap:TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount |
| Documentation: | Carrying amount of financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount |
| Label | Role | Language |
| Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 30 50 1A (b)(1) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |