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Revenue Recognition (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($)
Chiptopia Summer Rewards [Member] |
Revenue recognized from deferred liability | $ 5,489

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=cmg_ChiptopiaSummerRewardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |