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Stock-Based Compensation and Other Stock Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 03, 2015 | Sep. 27, 2014 | Oct. 03, 2015 | Sep. 27, 2014 | Jan. 03, 2015 | Dec. 28, 2013 | Dec. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Number of shares available for future grants | 0 | 0 | 0 | 0 |  |  |
Net stock-based compensation expense | $ 6.7 | $ 8.6 | $ 29.8 | $ 27.3 |  |  |
Cash received from stock purchase and option plan exercises | 3.2 | 1.8 | 39.7 | 30.8 |  |  |
Tax benefit realized from exercise and vesting of share-based payment arrangements | $ 1.1 | 0.8 | $ 20.4 | $ 16.2 |  |  |
2011 Incentive Stock and Awards Plan [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Number of shares available for future grants | 5,025,394 |  | 5,025,394 |  |  |  |
Employees Stock Purchase Plan [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Number of shares issued |  |  | 57,324 | 56,582 |  |  |
Number of shares reserved for issuance | 807,719 |  | 807,719 |  |  |  |
Employee contributions for purchase of common stock |  |  | $ 1.5 |  |  |  |
Stock based compensation expense | $ 0.0 | 0.1 | $ 2.1 | $ 1.1 |  |  |
Employee stock purchase plan, description |  |  | The purchase price of the company's common stock to participants is the lesser of the mean of the high and low price of the stock on the beginning date (May 15) or ending date (the following May 14) of each plan year. |  |  |  |
Franchisee Stock Purchase Plan [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Number of shares issued |  |  | 74,001 | 74,502 |  |  |
Number of shares reserved for issuance | 156,336 |  | 156,336 |  |  |  |
Stock based compensation expense | $ 0.0 | 0.2 | $ 2.2 | $ 1.0 |  |  |
Franchisee contributions for purchase of common stock |  |  | $ 2.5 |  |  |  |
Franchisee stock purchase plan, description |  |  | All franchisees in the United States and Canada are eligible to participate in a franchisee stock purchase plan. The purchase price of the company's common stock to participants is the lesser of the mean of the high and low price of the stock on the beginning date (May 15) or ending date (the following May 14) of each plan year. |  |  |  |
Stock Option [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Weighted average contractual term (in years) |  |  | 10 years |  |  |  |
Weighted-average grant date fair value granted |  |  | $ 25.64 | $ 20.19 |  |  |
Intrinsic value of stock exercised | 5.5 | 2.3 | $ 35.7 | $ 21.7 |  |  |
Fair value of stock vested |  |  | 9.9 | $ 9.5 |  |  |
Unrecognized compensation cost related to non-vested award | 19.5 |  | $ 19.5 |  |  |  |
Cost expected to be recognized over weighted-average period, in years |  |  | 1 year 8 months 12 days |  |  |  |
Performance Awards [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Weighted average contractual term (in years) |  |  | 3 years |  |  |  |
Weighted-average grant date fair value granted |  |  | $ 139.05 | $ 101.08 |  |  |
Unrecognized compensation cost related to non-vested award | 19.7 |  | $ 19.7 |  |  |  |
Cost expected to be recognized over weighted-average period, in years |  |  | 1 year 9 months 18 days |  |  |  |
Maximum stock percentage to be awarded |  |  | 100.00% |  |  |  |
Performance period for awards granted (in years) |  |  | 3 years |  |  |  |
Performance awards shares paid out |  |  | 130,764 | 146,313 |  |  |
Restricted Stock Units [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Performance period for awards granted (in years) |  |  | 1 year |  |  |  |
Awards granted vesting period (in years) |  |  | 2 years |  |  |  |
Shares granted |  |  |  |  | 78,585 | 84,413 | 95,047
Units granted vesting date |  |  |  |  | 2016 | 2015 | 2014
Shares vested |  |  |  |  | 95,047 |  |
Cash-Settled Stock Appreciation Rights [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Weighted average contractual term (in years) |  |  | 10 years |  |  |  |
Weighted-average grant date fair value granted |  |  | $ 20.98 |  |  |  |
Intrinsic value of stock exercised | 0.4 | $ 0.7 | $ 10.4 | $ 4.7 |  |  |
Fair value of stock vested |  |  | 3.8 | $ 4.7 |  |  |
Unrecognized compensation cost related to non-vested award | $ 0.3 |  | $ 0.3 |  |  |  |
Cost expected to be recognized over weighted-average period, in years |  |  | 1 year 8 months 12 days |  |  |  |
Shares granted | 0 | 0 | 4,000 |  |  |  |
Shares vested |  |  | 44,000 |  |  |  |
Restricted Stock [Member] | Non-employee Directors [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Shares granted |  |  | 8,640 |  | 10,398 |  |
Stock-Settled SARs [Member] |  |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |  |  |
Number of shares available for future grants | 0 | 0 | 0 | 0 |  |  |
Weighted-average grant date fair value granted |  |  | $ 25.37 | $ 19.55 |  |  |
Intrinsic value of stock exercised | $ 0.2 | $ 0.0 | $ 0.9 | $ 0.1 |  |  |
Fair value of stock vested |  |  | 1.4 | $ 0.6 |  |  |
Unrecognized compensation cost related to non-vested award | $ 3.2 |  | $ 3.2 |  |  |  |
Cost expected to be recognized over weighted-average period, in years |  |  | 1 year 8 months 12 days |  |  |  |
Shares granted |  |  | 113,000 |  |  |  |

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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Description of the plan, including the basis for determining contributions, the employee groups covered, and the nature and effect of significant matters affecting comparability of information for all periods presented. For leveraged ESOPs and pension reversion ESOPs, the description generally includes the basis for releasing shares and how dividends on allocated and unallocated shares are used. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 + Details
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