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Share-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 07, 2007 | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013 | Dec. 31, 2011
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options |  | $ 22.7 |  |  |
Percentage of company's total shares outstanding |  | 3.00% |  |  | 3.00%
Common stock reserved for future issuance |  | 15,900,000 |  |  |
Unrecognized share-based compensation related to unvested options granted |  | $ 0.1 |  |  |
Total fair market value of all vesting options |  | 10.4 | $ 11.2 | $ 12.3 |
Aggregated intrinsic value of options outstanding |  | 147.8 |  |  |
Aggregated intrinsic value of options exercisable |  | 94.2 |  |  |
Aggregated intrinsic value of options exercised |  | $ 26.4 | $ 6.6 | 4.2 |
Weighted average remaining contractual term of options outstanding, years price below the market value |  | 5 years 6 months 15 days |  |  |
Weighted average remaining contractual term of options exercisable, years |  |  | 4 years |  |
Total income tax benefit recognized for share-based compensation expense |  | $ 3.7 | $ 3.7 | $ 3.9 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  | 4,000,000 |  |  |
Two Thousand Seven Plan [Member] |  |  |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Issuance of options to purchase shares | 3,000,000.0 |  |  |  |
Expiration period of options | 10 years |  |  |  |
Common stock shares added to share reserve | 1,700,000.0 |  |  |  |
Employee Stock Option [Member] |  |  |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Unrecognized share-based compensation related to unvested options granted, term |  | 3 years 3 months 15 days |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Unrecognized share-based compensation related to unvested options granted, term |  | 1 year |  |  |
Two Thousand Seven Plan [Member] |  |  |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Vesting period of options | 5 years |  |  |  |
Two Thousand Seven Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Schedule Of Share Based Compensation Arrangements [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  | 25.00% |  |  |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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