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