Stock-Based Compensation Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 22.8	$ 18.7	$ 25.1
Income tax benefits for grants	$ 7.9	6.1	8.4
Maximum expiry period of options granted from the grant date	10 years
Vesting period of options granted	3 years
Lapsing period of restrictions related to restricted stock issued	three- to five-year
Total pretax intrinsic value of options exercised	$ 4.0	$ 14.5	10.3
Closing stock price	$ 21.95
Stock options exercisable and in-the-money, number	3,546,676	1,811,921
Stock options exercisable and in-the-money, weighted average exercise price	$ 16.81	$ 11.94
Available For Issuance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive units	6,126,194
Option Or Stock Appreciation Right [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive units	1.0
Non-Stock Option Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock incentive units	2.6
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to nonvested shares and stock option grants	$ 4.8	$ 4.6	$ 4.6
Weighted-average period of recognition	1 year 4 months 24 days	1 year 2 months 12 days	1 year 2 months 12 days
Restricted Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to nonvested shares and stock option grants	$ 16.6	$ 17.2	$ 16.2
Weighted-average period of recognition	2 years 1 month 6 days	1 year 10 months 24 days	2 years
Total fair value of shares vested	$ 7.7	$ 11.1	$ 19.5
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to nonvested shares and stock option grants	$ 8.2	$ 4.5	$ 6.0
Weighted-average period of recognition	1 year 9 months 18 days	2 years	1 year 3 months 18 days
Total fair value of shares vested	$ 5.2	$ 8.7	$ 6.6

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Closing stock price.

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Stock incentive units.

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