| Standard label: | Amortization Period of Deferred Gain (Loss) on Discontinuation of Price Risk Fair Value Hedge |
| Name: | us-gaap:AmortizationPeriodOfDeferredGainLossOnDiscontinuationOfPriceRiskFairValueHedge1 |
| Documentation: | Period when adjustments to the carrying value of a hedged item are amortized upon discontinuation of the price risk fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. |
| Object type: | cm:Concept |
| Data type: | xbrli:durationItemType |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AmortizationPeriodOfDeferredGainLossOnDiscontinuationOfPriceRiskFairValueHedge1 |
| Label | Role | Language |
| Amortization Period of Deferred Gain (Loss) on Discontinuation of Price Risk Fair Value Hedge | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 25 35 9 | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |