cm:Concept: us-gaap:ObjectivesForUsingNetInvestmentHedgingInstruments
| Objectives for Using Net Investment Hedging Instruments |
| us-gaap:ObjectivesForUsingNetInvestmentHedgingInstruments |
| Description of the reasons for holding or issuing derivative and nonderivative instruments designated as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation. Includes discussion of the objectives for holding the instruments, the context needed to understand those objectives, and the strategies for achieving those objectives. Disclosures may be more meaningful if such objectives and strategies are described in the context of an entity's overall risk management profile. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ObjectivesForUsingNetInvestmentHedgingInstruments |