| Standard label: | Asset Impairment Charges |
| Name: | us-gaap:AssetImpairmentCharges |
| Documentation: | Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AssetImpairmentCharges |
| Label | Role | Language |
| Asset Impairment Charges | http://www.xbrl.org/2003/role/label | en-US |
| Asset Impairment Charges, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 360 10 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 360 |
| Part Of Roll Up: |
| us-gaap:RestructuringSettlementAndImpairmentProvisions |
| us-gaap:RestructuringCostsAndAssetImpairmentCharges |