| Standard label: | Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
| Name: | us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset |
| Documentation: | Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and obligation to return cash collateral under master netting arrangements. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset |
| Label | Role | Language |
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | http://www.xbrl.org/2003/role/label | en-US |
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 20 50 3 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 210 20 55 8 | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 815 10 45 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |