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Leases (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($)
Leases [Abstract] |  |
Operating lease payments related to options to extend lease terms | $ 2,321,456 |
Operating lease payments not yet commenced | 289,840 |
Future sublease income | $ 20,132 |
Number of sale leaseback transactions | item | 6 |
Deemed landlord financing liability | $ 1,515 | $ 1,845

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- Definition Lessee, Operating Future Sublease Income + References No definition available. + Details
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Namespace Prefix: | cmg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Lessee, Operating Lease, Lease Not yet Commenced + References No definition available. + Details
Name: | cmg_LesseeOperatingLeaseLeaseNotYetCommenced
Namespace Prefix: | cmg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Number of sale leaseback transactions + References No definition available. + Details
Name: | cmg_NumberOfSaleLeasebackTransactions
Namespace Prefix: | cmg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Operating lease payments related to options to extend lease terms. + References No definition available. + Details
Name: | cmg_OperatingLeasePaymentsRelatedToOptionsToExtendLeaseTerms
Namespace Prefix: | cmg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
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