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Pension Plans - Summary of Fair Value by Asset Category and Within Fair Value Hierarchy (Detail) - USD ($) $ in Millions | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 1,049.2 | $ 1,103.4 | $ 1,015.4
Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 892.3 | 939.4 |
Domestic Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 21.3 | 26.9 |
Domestic Pension Plans [Member] | Domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 53.9 | 57.5 |
Domestic Pension Plans [Member] | Foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 61.7 | 67.5 |
Domestic Pension Plans [Member] | Commingled funds - domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 169.3 | 171.1 |
Domestic Pension Plans [Member] | Commingled funds - foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 110.0 | 111.5 |
Domestic Pension Plans [Member] | Private equity partnerships [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 43.7 | 47.4 |
Domestic Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 133.0 | 138.2 |
Domestic Pension Plans [Member] | Corporate bond [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 195.8 | 197.0 |
Domestic Pension Plans [Member] | Real estate and other real assets [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 17.4 | 30.8 |
Domestic Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 86.2 | 91.5 |
Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 156.9 | 164.0 |
Foreign Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 0.2 | 0.8 |
Foreign Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 17.9 | 18.1 |
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 119.0 | 121.7 |
Foreign Pension Plans [Member] | Insurance contracts [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 19.8 | 23.4 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 269.9 | 290.1 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 21.3 | 26.9 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 53.9 | 57.5 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 61.7 | 67.5 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 133.0 | 138.2 |
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 0.2 | 0.8 |
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 0.2 | 0.8 |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 475.1 | 479.6 |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Commingled funds - domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 169.3 | 171.1 |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Commingled funds - foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 110.0 | 111.5 |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Corporate bond [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 195.8 | 197.0 |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 138.8 | 145.1 |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 119.0 | 121.7 |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] | Insurance contracts [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 19.8 | 23.4 |
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 147.3 | 169.7 |
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member] | Private equity partnerships [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 43.7 | 47.4 |
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member] | Real estate and other real assets [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 17.4 | 30.8 |
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 86.2 | 91.5 |
Significant Unobservable Inputs (Level 3) [Member] | Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 17.9 | 18.1 |
Significant Unobservable Inputs (Level 3) [Member] | Foreign Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 17.9 | $ 18.1 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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