cm:Concept: us-gaap:ResaleAgreementCounterpartyAmountAtRisk
| Resale Agreement Counterparty, Amount at Risk |
| us-gaap:ResaleAgreementCounterpartyAmountAtRisk |
| The amount at risk under resale agreements (reverse repurchase agreements) is defined as the excess of the carrying amount of the resale agreements over the market value of assets delivered pursuant to the agreements by the counterparty to the registrant (or to a third party agent that has affirmatively agreed to act on behalf of the registrant) and not returned to the counterparty, except in exchange for their approximate market value in a separate transaction. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:ResaleAgreementCounterpartyAmountAtRisk |