cm:Level2TextBlock: us-gaap:DerivativesOffsettingFairValueAmountsPolicy
Derivatives, Offsetting Fair Value Amounts, Policy [Policy Text Block] |
us-gaap:DerivativesOffsettingFairValueAmountsPolicy |
Disclosure of accounting policy for offsetting or not offsetting fair value amounts recognized for derivative instruments against such amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) arising from derivative instruments recognized at fair value. |
cm:Level2TextBlock |
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false |
us-gaap:DerivativesOffsettingFairValueAmountsPolicy |