cm:Concept: us-gaap:DebtSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairment
Debt Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment |
us-gaap:DebtSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairment |
Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). Excludes other-than-temporary impairment (OTTI). |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Credit |
false |
us-gaap:DebtSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairment |