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Pension Plans - Summary of Fair Value by Asset Category and Within Fair Value Hierarchy (Detail) - USD ($) $ in Millions | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 1,305.0 | $ 1,110.8 | $ 1,049.2
Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 1,122.7 | 957.1 |
Domestic Pension Plans [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 520.6 | 441.3 |
Domestic Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 20.6 | 20.4 |
Domestic Pension Plans [Member] | Domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 73.4 | 66.0 |
Domestic Pension Plans [Member] | Foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 100.1 | 74.7 |
Domestic Pension Plans [Member] | Commingled funds - domestic [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 225.0 | 191.3 |
Domestic Pension Plans [Member] | Commingled funds - domestic [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 225.0 | 191.3 |
Domestic Pension Plans [Member] | Commingled funds - foreign [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 148.8 | 117.7 |
Domestic Pension Plans [Member] | Commingled funds - foreign [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 148.8 | 117.7 |
Domestic Pension Plans [Member] | Private Equity Partnerships [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 27.5 | 34.2 |
Domestic Pension Plans [Member] | Private Equity Partnerships [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 27.5 | 34.2 |
Domestic Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 155.0 | 140.1 |
Domestic Pension Plans [Member] | Corporate bond [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 253.0 | 214.6 |
Domestic Pension Plans [Member] | Real estate and other real assets [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 13.2 | 10.4 |
Domestic Pension Plans [Member] | Real estate and other real assets [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 13.2 | 10.4 |
Domestic Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 106.1 | 87.7 |
Domestic Pension Plans [Member] | Hedge Funds [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 106.1 | 87.7 |
Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 182.3 | 153.7 |
Foreign Pension Plans [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 130.3 | 131.7 |
Foreign Pension Plans [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 0.7 | 0.7 |
Foreign Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 8.8 |  |
Foreign Pension Plans [Member] | Corporate bond [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 18.3 |  |
Foreign Pension Plans [Member] | Hedge Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 16.1 | 14.3 |
Foreign Pension Plans [Member] | Hedge Funds [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 16.1 | 14.3 |
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 114.2 | 117.4 |
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member] | Investments Measured at NAV [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 114.2 | 117.4 |
Foreign Pension Plans [Member] | Insurance contracts [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 24.2 | 21.3 |
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 346.9 | 300.3 |
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 | 20.6 | 20.4 |
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 | 73.4 | 66.0 |
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 | 100.1 | 74.7 |
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 | 152.8 | 139.2 |
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 9.5 | 0.7 |
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 | 0.7 | 0.7 |
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 8.8 |  |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 255.2 | 215.5 |
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Government [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 2.2 | 0.9 |
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 | 253.0 | 214.6 |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 42.5 | 21.3 |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] | Corporate bond [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 18.3 |  |
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 | $ 24.2 | $ 21.3 |

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