| Standard label: | Derivative, Fair Value, Amount Offset Against Collateral, Net |
| Name: | us-gaap:DerivativeFairValueAmountOffsetAgainstCollateralNet |
| Documentation: | The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement. |
| 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:DerivativeFairValueAmountOffsetAgainstCollateralNet |
| Label | Role | Language |
| Derivative, Fair Value, Amount Offset Against Collateral, Net | http://www.xbrl.org/2003/role/label | en-US |
| Derivative, Fair Value, Amount Offset Against Collateral, Net, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 8 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |