| Standard label: | Accelerated Share Repurchases, Settlement (Payment) or Receipt |
| Name: | us-gaap:AcceleratedShareRepurchasesSettlementPaymentOrReceipt |
| Documentation: | Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AcceleratedShareRepurchasesSettlementPaymentOrReceipt |
| Label | Role | Language |
| Accelerated Share Repurchases, Settlement (Payment) or Receipt | 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 |