cm:Concept: us-gaap:MarketRiskBenefitPeriodIncreaseDecrease
Market Risk Benefit, Period Increase (Decrease) |
us-gaap:MarketRiskBenefitPeriodIncreaseDecrease |
Amount of increase (decrease) in 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. |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
(no balance type) |
false |
us-gaap:MarketRiskBenefitPeriodIncreaseDecrease |