| Standard label: | Accounting Standards Update 2018-09 [Member] | 
| Name: | us-gaap:AccountingStandardsUpdate201809Member | 
| Documentation: | Accounting Standards Update 2018-09 Codification Improvements. | 
| Object type: | cm:Member | 
| Data type: | [Member] (nonnum:domainItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | true | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AccountingStandardsUpdate201809Member | 
| Label | Role | Language | 
| Accounting Standards Update 2018-09 [Member] | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 105 10 65 4 (c) | http://www.xbrl.org/2003/role/disclosureRef | 105 | 
| FASB Accounting Standards Codification 105 10 65 4 (f) | http://www.xbrl.org/2003/role/disclosureRef | 105 | 
| FASB Accounting Standards Codification 105 10 65 5 (e) | http://www.xbrl.org/2003/role/disclosureRef | 105 | 
| FASB Accounting Standards Codification 740 10 65 7 (a) | http://www.xbrl.org/2003/role/disclosureRef | 740 | 
| FASB Accounting Standards Codification 740 10 65 7 (b) | http://www.xbrl.org/2003/role/disclosureRef | 740 | 
| FASB Accounting Standards Codification 825 10 65 4 (a) | http://www.xbrl.org/2003/role/disclosureRef | 825 | 
| FASB Accounting Standards Codification 825 10 65 4 (b) | http://www.xbrl.org/2003/role/disclosureRef | 825 |