cm:Concept: us-gaap:AccruedLiabilitiesForUnredeeemedGiftCards
| Gift Card Liability, Current |
| us-gaap:AccruedLiabilitiesForUnredeeemedGiftCards |
| Carrying value as of the balance sheet date of the liability for outstanding gift cards. Retail customers purchase gift cards or gift certificates that can be redeemed at a later date for merchandise or services; those unredeemed represent a liability of the entity because the revenue is being deferred. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:AccruedLiabilitiesForUnredeeemedGiftCards |