| Standard label: | Commitments [Member] |
| Name: | us-gaap:CommitmentsMember |
| Documentation: | This element represents significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. |
| 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:CommitmentsMember |
| Label | Role | Language |
| Commitments [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(25)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 440 10 50 1 (f) | http://fasb.org/us-gaap/role/ref/legacyRef | 440 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03(17)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(19)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |