cm:Level2TextBlock: us-gaap:PolicyLoansReceivablePolicy
| Policy Loans Receivable, Policy [Policy Text Block] |
| us-gaap:PolicyLoansReceivablePolicy |
| Disclosure of accounting policy for policy loans receivable, including the basis for determining the amount reported for loans made to policyholders against and secured by future policy benefits. May also disclose the range of interest rates charged to policyholders on such loans. |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:PolicyLoansReceivablePolicy |