Pension Plans - Summary of Fair Value by Asset Category and Within Fair Value Hierarchy (Detail) (USD $) In Millions, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,103.4	$ 1,015.4	$ 964.0
Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	939.4	863.4
Domestic Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26.9	18.0
Domestic Pension Plans [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	57.5	59.9
Domestic Pension Plans [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	67.5	65.4
Domestic Pension Plans [Member] | Commingled funds - domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	171.1	162.6
Domestic Pension Plans [Member] | Commingled funds - foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	111.5	105.5
Domestic Pension Plans [Member] | Private equity partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47.4	49.4
Domestic Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138.2	110.8
Domestic Pension Plans [Member] | Corporate bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	197.0	166.1
Domestic Pension Plans [Member] | Real estate and other real assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.8	35.4
Domestic Pension Plans [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	91.5	90.3
Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	164.0	152.0
Foreign Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.8	0.8
Foreign Pension Plans [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.1	24.8
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	121.7	122.4
Foreign Pension Plans [Member] | Insurance contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.4	4.0
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	290.1	254.1
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	26.9	18.0
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	57.5	59.9
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	67.5	65.4
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	138.2	110.8
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.8	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	0.8	0.8
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	479.6	434.2
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	171.1	162.6
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	111.5	105.5
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	197.0	166.1
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	145.1	126.4
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	121.7	122.4
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	23.4	4.0
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	169.7	175.1
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	47.4	49.4
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	30.8	35.4
Significant Unobservable Inputs (Level 3) [Member] | Domestic Pension Plans [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	91.5	90.3
Significant Unobservable Inputs (Level 3) [Member] | Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.1	24.8
Significant Unobservable Inputs (Level 3) [Member] | Foreign Pension Plans [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 18.1	$ 24.8