cm:Concept: us-gaap:RecordedThirdPartyEnvironmentalRecoveriesReceivable
| Recorded Third-Party Environmental Recoveries Receivable |
| us-gaap:RecordedThirdPartyEnvironmentalRecoveriesReceivable |
| Carrying amount as of the balance sheet date of known and reasonably estimable amounts of recoveries from third-parties pertaining to an entity's environmental remediation obligations. An entity's balance sheet may include several assets that relate to an environmental remediation obligation. Among them are the following: a. Receivables from other potentially responsible parties that are not providing initial funding; b. anticipated recoveries from insurers; and c. anticipated recoveries from prior owners as a result of indemnification agreements. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:RecordedThirdPartyEnvironmentalRecoveriesReceivable |