| Standard label: | Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest |
| Name: | us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |
| Documentation: | Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |
| Label | Role | Language |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | http://www.xbrl.org/2003/role/label | en-US |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 220 10 45 1B (b) | http://www.xbrl.org/2003/role/disclosureRef | 220 |
| FASB Accounting Standards Codification 220 10 45 1A (c) | http://www.xbrl.org/2003/role/disclosureRef | 220 |
| FASB Accounting Standards Codification 810 10 55 4K | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 810 10 45 19 | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| Part Of Roll Up: |
| us-gaap:ComprehensiveIncomeNetOfTax |