cm:Concept: us-gaap:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale
Payments to Acquire Mortgage-backed Securities (MBS), Available-for-sale |
us-gaap:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale |
Amount of cash outflow for purchase of mortgage-backed security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Credit |
false |
us-gaap:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale |