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Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 26, 2012 | Dec. 28, 2011 | Dec. 29, 2010
Accounting Policies [Abstract] |  |  |
Short-term investments | $ 11.8 | $ 12.0 |
Net gain/(loss) on investments (less than $0.1 million in 2011) | 0.7 | (0.1) | 0.5
Deferred compensation plan investments | 6.4 | 4.9 |
Cash overdrafts | 6.3 | 7.8 |
Maximum self-insurance retention levels, minimum per individual claim | 0.5 |  |
Maximum self-insurance retention levels, maximum per individual claim | 1.0 |  |
Discounted insurance liabilities | 23.2 | 24.6 |
Self insurance liabilities, discount rate | 1.00% | 1.50% |
Undiscounted insurance liabilities | 23.8 | 25.6 |
Revenue recognized in breakage on gift cards | 0.3 | 0.3 |
Initial franchise fees | 3.0 | 3.1 | 6.6
Deferred fees | 1.2 | 1.1 |
Concentration Risk [Line Items] |  |  |
Advertising expense | 13.4 | 16.1 | 17.4
Advertising contributions from franchisees | $ 65.1 | $ 60.5 | $ 52.1
Franchise and license fees | Revenue from franchises and licenses risk |  |  |
Concentration Risk [Line Items] |  |  |
Franchise revenue, percentage | 32.00% | 34.00% | 33.00%

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition The rate applied as of the balance sheet date to reduce the undiscounted amount of a guarantee fund and other insurance-related assessments to present value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 405 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392405&loc=d3e24119-109301 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 97-3 -Paragraph 27 -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. + Details
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- Definition The amount of breakage recognized related to unredeemed gift cards. Breakage occurs when a customer pays in advance of vendor performance and does not demand full performance for various reasons. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2197196 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Breakage -URI http://asc.fasb.org/extlink&oid=6506468 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 16 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.B.Q1) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 + Details
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