| Standard label: | Proceeds from (Repayments of) Long-term Debt and Capital Securities |
| Name: | us-gaap:ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities |
| Documentation: | Amount of cash inflow (outflow) from long-term debt, including capital lease obligations and mandatory redeemable capital securities. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities |
| Label | Role | Language |
| Proceeds from (Repayments of) Long-term Debt and Capital Securities | http://www.xbrl.org/2003/role/label | en-US |
| Proceeds from (Repayments of) Long-term Debt and Capital Securities, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 3 (SX 210.12-04(a)) | http://www.xbrl.org/2009/role/commonPracticeRef | 235 |
| Part Of Roll Up: |
| us-gaap:ProceedsFromRepaymentsOfDebt |