| Standard label: | Supply Commitment [Table Text Block] | 
| Name: | us-gaap:SupplyCommitmentTableTextBlock | 
| Documentation: | Tabular disclosure of arrangements in which the entity has committed resources to supply goods or services to a customer. May include identification of the goods or services to be furnished, identity of the purchasing party, pricing, effects on pricing for failing to deliver the [minimum] quantities required to be furnished, cancellation rights, and termination provisions. | 
| Object type: | cm:Level3TextBlock | 
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SupplyCommitmentTableTextBlock | 
| Examples of this text block disclosure: | SupplyCommitment | 
| Label | Role | Language | 
| Supply Commitment [Table Text Block] | 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 |