cm:Concept: us-gaap:DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome
Debt Securities, Held-to-maturity, Change in Present Value, Interest Income |
us-gaap:DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome |
Amount of interest income on investment in debt security measured at amortized cost (held-to-maturity), from change in present value of expected cash flows, attributable to passage of time. |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Credit |
false |
us-gaap:DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome |