cm:Member: us-gaap:RevenueFromContractWithCustomerProductAndServiceBenchmarkMember
Revenue from Contract with Customer, Product and Service Benchmark [Member] |
us-gaap:RevenueFromContractWithCustomerProductAndServiceBenchmarkMember |
Revenue from satisfaction of performance obligation by transferring promised product and service to customer for specified product or service, when it serves as benchmark in concentration of risk calculation. |
cm:Member |
[Member] (nonnum:domainItemType) |
For Period (duration) |
(no balance type) |
true |
us-gaap:RevenueFromContractWithCustomerProductAndServiceBenchmarkMember |