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v3.20.2

Revenue Recognition (Narrative) (Details) | 9 Months Ended
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Sep. 30, 2020
Gift card breakage revenue recognition period | 1 year
Earned Points Expiration Period For Inactivity | 6 months
Minimum [Member] |
Earned rewards, expiration period | 1 month
Maximum [Member] |
Earned rewards, expiration period | 2 months

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- Definition Earned points expiration period for inactivity. + References No definition available. + Details
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Namespace Prefix: | cmg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Earned rewards, expiration period. + References No definition available. + Details
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Namespace Prefix: | cmg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Gift card breakage revenue recognition period + References No definition available. + Details
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Namespace Prefix: | cmg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |