cm:Level1TextBlock: us-gaap:CapitalLeasesInFinancialStatementsOfLessorDisclosureTextBlock
| Capital Leases in Financial Statements of Lessor Disclosure [Text Block] |
| us-gaap:CapitalLeasesInFinancialStatementsOfLessorDisclosureTextBlock |
| The entire disclosure for lessor's leasing arrangements, which includes direct financing, sales type and leveraged leases. Disclosure may include the effect on the balance sheet and the income statement resulting from a change in lease classification for leases that at inception would have been classified differently had guidance been in effect at the inception of the original lease. |
| cm:Level1TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:CapitalLeasesInFinancialStatementsOfLessorDisclosureTextBlock |
| CapitalLeasesInFinancialStatementsOfLessorDisclosure |