cm:Concept: us-gaap:DepositsMoneyMarketDeposits
| Deposits, Money Market Deposits |
| us-gaap:DepositsMoneyMarketDeposits |
| Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:DepositsMoneyMarketDeposits |