Fair Value of Plan Assets (Detail) - UNITED KINGDOM - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 312	$ 282	$ 313
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	1
Developed Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8	8
Emerging Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Mutual Funds Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	19
Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	23
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55	54
Foreign Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	107	91
Liability Term Matching Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	128	115
Emerging Markets Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	3
High Yield Debt
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	18
Defined Benefit Plan, Debt Security
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	256
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		227
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	13
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	1
Quoted Prices in Active Markets for Identical Assets (Level 1) | Developed Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8	8
Quoted Prices in Active Markets for Identical Assets (Level 1) | Emerging Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12	12
Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	281	250
Significant Observable Inputs (Level 2) | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	23
Significant Observable Inputs (Level 2) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	23
Significant Observable Inputs (Level 2) | Foreign Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	107	91
Significant Observable Inputs (Level 2) | Liability Term Matching Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	128	115
Significant Observable Inputs (Level 2) | Emerging Markets Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	3
Significant Observable Inputs (Level 2) | High Yield Debt
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	18
Significant Observable Inputs (Level 2) | Defined Benefit Plan, Debt Security
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	256
Significant Observable Inputs (Level 2) | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		227
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	19
Significant Unobservable Inputs (Level 3) | Mutual Funds Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	19
Significant Unobservable Inputs (Level 3) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 18	$ 19