| Standard label: | Leveraged Leases, Balance Sheet, Investment in Leveraged Leases |
| Name: | us-gaap:LeveragedLeasesBalanceSheetInvestmentInLeveragedLeases |
| Documentation: | The net investment in arrangements meeting the criteria to be classified as leveraged excluding deferred taxes. |
| 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:LeveragedLeasesBalanceSheetInvestmentInLeveragedLeases |
| Label | Role | Language |
| Leveraged Leases, Balance Sheet, Investment in Leveraged Leases | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 840 30 50 5 | http://www.xbrl.org/2003/role/disclosureRef | 840 |
| FASB Accounting Standards Codification 840 30 45 5 | http://www.xbrl.org/2003/role/disclosureRef | 840 |
| FASB Accounting Standards Codification 842 50 50 1 | http://www.xbrl.org/2003/role/disclosureRef | 842 |