cm:Level2TextBlock: us-gaap:ClosedBlockAccountingPolicy
| Closed Block Accounting Policy [Policy Text Block] |
| us-gaap:ClosedBlockAccountingPolicy |
| Disclosure of accounting policy for defined, limited group of policies and defined set of assets governed by set of operating rules to preserve reasonable dividend expectation of individual policyholder with individual life, health, and annuity policies for which dividends are currently being paid or are expected to be paid under current dividend scale. |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ClosedBlockAccountingPolicy |