Amount of cash paid to acquire the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Significant Accounting Policies - Narrative (Detail) (USD $) In Millions, unless otherwise specified				0 Months Ended
	Mar. 25, 2012 Entity	Dec. 25, 2011	Mar. 27, 2011 Entity	Apr. 30, 2012 Denver and Minneapolis Markets [Member] Subsequent Event [Member] Restaurant	Apr. 23, 2012 Denver and Minneapolis Markets [Member] Subsequent Event [Member]
Redeemable Noncontrolling Interest [Line Items]
Number of joint venture arrangements	2		2
Mandatorily redeemable noncontrolling interest and redeemable noncontrolling interest holders' equity	$ 16.0	$ 15.0
Net deferred tax asset	1.9
Number of restaurants acquired				56
Purchase price of restaurants, cash paid					$ 5.1
Number of restaurants sold				6