cm:Concept: us-gaap:MarketRiskBenefitChangeInFairValueGainLoss
Market Risk Benefit, Change in Fair Value, Gain (Loss) |
us-gaap:MarketRiskBenefitChangeInFairValueGainLoss |
Amount of gain (loss) from (increase) decrease in fair value of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. Excludes change attributable to instrument-specific credit risk. |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Credit |
false |
us-gaap:MarketRiskBenefitChangeInFairValueGainLoss |