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Earnings Per Share (Stock Awards Excluded From The Calculation Of Diluted EPS) (Details) - shares shares in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Earnings Per Share [Abstract] |  |
Stock awards subject to performance conditions | 55 | 69
Stock awards that were antidilutive | 142 | 48
Total stock awards excluded from diluted earnings per share | 197 | 117

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- Definition Securities Excluded From Computation of Earnings Per Share Amount, Due to Performance Conditions + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Stock awards that were excluded from diluted earnings per share. For example, stock awards subject to performance conditions and stock awards that were antidilutive. + References No definition available. + Details
Name: | cmg_SharesExcludedFromDilutedEarningsPerShare
Namespace Prefix: | cmg_
Data Type: | xbrli:sharesItemType
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Period Type: | duration

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- References No definition available. + Details
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