XML 64 R70.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Commitments and Contingencies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Loss contingency accrual	$ 45,721
Amount reserved in case of investigation	25,000
Data Security Incident [Member]
Loss contingency accrual	$ 15,000

X

- Definition

Loss Contingency, Amount Reserved For Investigation

+ References

No definition available.

+ Details

Name:	cmg_LossContingencyAmountReservedForInvestigation
Namespace Prefix:	cmg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_LitigationCaseAxis=cmg_DataSecurityIncidentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: