Commitments and Contingencies Contingencies (Details Textuals) $ in Millions	Dec. 27, 2016 USD ($) franchisee
Guarantee of Indebtedness of Others [Member]
Loss Contingencies [Line Items]
Franchisees Guaranteed Under Operating Leases \| franchisee	98
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 294.8
Noncompete Agreements [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 24.2

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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