XML 27 R14.htm IDEA: XBRL DOCUMENT v2.4.1.9

Basis of Presentation (Narrative) (Details)	3 Months Ended
	Mar. 31, 2015 segment
Product Information [Line Items]
Number of regions	8cmg_NumberOfRegionsInWhichEntityOperates
Number of reportable segments	1us-gaap_NumberOfReportableSegments
ShopHouse Southeast Asian Kitchen [Member]
Product Information [Line Items]
Number of restaurants	10us-gaap_NumberOfRestaurants / us-gaap_ProductOrServiceAxis = cmg_ShophouseSoutheastAsianKitchenMember
Pizzeria Locale [Member]
Product Information [Line Items]
Number of restaurants	2us-gaap_NumberOfRestaurants / us-gaap_ProductOrServiceAxis = cmg_PizzeriaLocaleMember
United States [Member]
Product Information [Line Items]
Number of restaurants	1,800us-gaap_NumberOfRestaurants / us-gaap_StatementGeographicalAxis = country_US
Canada [Member]
Product Information [Line Items]
Number of restaurants	9us-gaap_NumberOfRestaurants / us-gaap_StatementGeographicalAxis = country_CA
England [Member]
Product Information [Line Items]
Number of restaurants	6us-gaap_NumberOfRestaurants / us-gaap_StatementGeographicalAxis = country_GB
France [Member]
Product Information [Line Items]
Number of restaurants	3us-gaap_NumberOfRestaurants / us-gaap_StatementGeographicalAxis = country_FR
Germany [Member]
Product Information [Line Items]
Number of restaurants	1us-gaap_NumberOfRestaurants / us-gaap_StatementGeographicalAxis = country_DE

X

- Definition

The number of regions by which the Company manages its operations.

+ References

No definition available.

+ Details

Name:	cmg_NumberOfRegionsInWhichEntityOperates
Namespace Prefix:	cmg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of restaurants.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRestaurants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_ProductInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ProductOrServiceAxis=cmg_PizzeriaLocaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=cmg_ShophouseSoutheastAsianKitchenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_DE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_FR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: