| Standard label: | Schedule of Other Ownership Interests [Table] |
| Name: | us-gaap:ScheduleOfOtherOwnershipInterestsTable |
| Documentation: | Schedule of other units or shares or classes of ownership in a partnership. This schedule ordinarily includes a description of the ownership interest detailing special or unusual rights; the capital contributed to and the capital account balance of the other unit holders for the partnerships; number of units of other ownership interest authorized to be issued, issued, and outstanding in the partnerships; aggregate cumulative cash distributions made to, and aggregate cumulative net income shared by, the other unit holders in the partnership. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfOtherOwnershipInterestsTable |
| Label | Role | Language |
| Schedule of Other Ownership Interests [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 272 10 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 272 |
| FASB Accounting Standards Codification 272 10 50 3 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 272 |
| FASB Accounting Standards Codification 505 10 S99 5 (SAB TOPIC 4.F) | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |
| FASB Accounting Standards Codification 946 210 S99 1 (SX 210.6-04(16)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 210 S99 1 (SX 210.6-04(17)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |