cm:Concept: us-gaap:BorrowingsUnderGuaranteedInvestmentAgreements
| Borrowings under Guaranteed Investment Agreements |
| us-gaap:BorrowingsUnderGuaranteedInvestmentAgreements |
| Carrying value as of the balance sheet date of the sum of the obligations to contract holders to provide to them an agreed upon rate of return pursuant to the terms of the underlying contract. These contracts represent lending by the contract holders to the entity in return for a guaranteed (primarily fixed) interest rate until maturity, unless called earlier if the contracts provide that option to the contract holders (usually institutions). There is little or no insurance risk for the entity. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:BorrowingsUnderGuaranteedInvestmentAgreements |