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Pension Plans - Summary of Fair Value by Asset Category and Within Fair Value Hierarchy (Detail) - USD ($) $ in Millions	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,632.4	$ 1,455.5	$ 1,215.6
United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,401.0	1,260.5
United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,401.0	1,260.5
United States | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.3	25.6
United States | Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	111.8	95.1
United States | Foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62.4	58.4
United States | Commingled funds – domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	312.9	263.6
United States | Commingled funds – foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	248.5	209.4
United States | Private equity partnerships | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.7	17.4
United States | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	164.6	146.7
United States | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	377.9	327.7
United States | Real estate and other real assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.3	8.8
United States | Hedge funds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	73.6	107.8
Foreign Pension Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	231.4	195.0
Foreign Pension Plans | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1.0	0.9
Foreign Pension Plans | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.0	10.1
Foreign Pension Plans | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.8	21.4
Foreign Pension Plans | Insurance contracts | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32.2	27.1
Foreign Pension Plans | Commingled funds – multi-strategy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	162.4	135.5
Quoted Prices for Identical Assets (Level 1)   | United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	366.2	323.1
Quoted Prices for Identical Assets (Level 1)   | United States | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.3	25.6
Quoted Prices for Identical Assets (Level 1)   | United States | Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	111.8	95.1
Quoted Prices for Identical Assets (Level 1)   | United States | Foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62.4	58.4
Quoted Prices for Identical Assets (Level 1)   | United States | Commingled funds – domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | United States | Commingled funds – foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | United States | Private equity partnerships | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | United States | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	161.7	144.0
Quoted Prices for Identical Assets (Level 1)   | United States | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | United States | Real estate and other real assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | United States | Hedge funds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.0	11.0
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1.0	0.9
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.0	10.1
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Insurance contracts | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Quoted Prices for Identical Assets (Level 1)   | Foreign Pension Plans | Commingled funds – multi-strategy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	380.8	330.4
Significant Other Observable Inputs (Level 2)   | United States | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Commingled funds – domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Commingled funds – foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Private equity partnerships | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.9	2.7
Significant Other Observable Inputs (Level 2)   | United States | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	377.9	327.7
Significant Other Observable Inputs (Level 2)   | United States | Real estate and other real assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | United States | Hedge funds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	56.0	48.5
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.8	21.4
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Insurance contracts | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32.2	27.1
Significant Other Observable Inputs (Level 2)   | Foreign Pension Plans | Commingled funds – multi-strategy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	654.0	607.0
Investments Measured at NAV | United States | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Commingled funds – domestic | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	312.9	263.6
Investments Measured at NAV | United States | Commingled funds – foreign | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	248.5	209.4
Investments Measured at NAV | United States | Private equity partnerships | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.7	17.4
Investments Measured at NAV | United States | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | United States | Real estate and other real assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.3	8.8
Investments Measured at NAV | United States | Hedge funds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	73.6	107.8
Investments Measured at NAV | Foreign Pension Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	162.4	135.5
Investments Measured at NAV | Foreign Pension Plans | Cash and cash equivalents | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | Foreign Pension Plans | Government | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | Foreign Pension Plans | Corporate bonds | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | Foreign Pension Plans | Insurance contracts | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Investments Measured at NAV | Foreign Pension Plans | Commingled funds – multi-strategy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 162.4	$ 135.5

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