| Standard label: | Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Frequency |
| Name: | us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionFrequency |
| Documentation: | States the frequency (for example, annually, semi-annually, quarterly) with which the entity can redeem its investment, or portion thereof, for each of those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments), by major category. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionFrequency |
| Label | Role | Language |
| Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Frequency | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 6A (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 820 |