| Standard label: | Multiemployer Plan, Contribution Rate Increase (Decrease) |
| Name: | us-gaap:MultiemployerPlanContributionRateIncreaseDecrease |
| Documentation: | Increase (decrease) in employer's contractual contribution rate to multiemployer plan. |
| Object type: | cm:Concept |
| Data type: | Percent (num:percentItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:MultiemployerPlanContributionRateIncreaseDecrease |
| Label | Role | Language |
| Multiemployer Plan, Contribution Rate Increase (Decrease) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 715 80 50 6 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 715 |
| FASB Accounting Standards Codification 715 80 50 11 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 715 |