| Standard label: | Income (Loss) from Equity Method Investments |
| Name: | us-gaap:IncomeLossFromEquityMethodInvestments |
| Documentation: | Amount of income (loss) for proportionate share of equity method investee's income (loss). |
| 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:IncomeLossFromEquityMethodInvestments |
| Label | Role | Language |
| Income (Loss) from Equity Method Investments | http://www.xbrl.org/2003/role/label | en-US |
| Income (Loss) from Equity Method Investments, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 220 10 S99 2 (SX 210.5-03(12)) | http://fasb.org/us-gaap/role/ref/legacyRef | 220 |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 280 10 50 22 (g) | http://www.xbrl.org/2003/role/disclosureRef | 280 |
| FASB Accounting Standards Codification 323 10 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 323 |
| FASB Accounting Standards Codification 942 220 S99 1 (SX 210.9-04(13)(f)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |
| FASB Accounting Standards Codification 944 220 S99 1 (SX 210.7-04(10)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |