| Standard label: | Accelerated Share Repurchases, Final Price Paid Per Share |
| Name: | us-gaap:AcceleratedShareRepurchasesFinalPricePaidPerShare |
| Documentation: | Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. |
| Object type: | cm:Concept |
| Data type: | Share (num:perShareItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AcceleratedShareRepurchasesFinalPricePaidPerShare |
| Label | Role | Language |
| Accelerated Share Repurchases, Final Price Paid Per Share | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 505 30 25 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |