Fair Value of Plan Assets (Detail) - UNITED KINGDOM - USD ($) $ in Millions	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 189	$ 358	$ 360
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	9
Developed Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		13
Emerging Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4
Mutual Funds Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2
Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	30
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	49
UK Debt Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	154
Liability Term Matching Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	76	115
Emerging Markets Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2
High Yield Debt
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17	29
Defined Benefit Plan, Debt Security
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	179	300
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	26
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	9
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		13
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
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		17
Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	188	330
Significant Observable Inputs (Level 2) | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	30
Significant Observable Inputs (Level 2) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	30
Significant Observable Inputs (Level 2) | UK Debt Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	154
Significant Observable Inputs (Level 2) | Liability Term Matching Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	76	115
Significant Observable Inputs (Level 2) | Emerging Markets Debt Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2
Significant Observable Inputs (Level 2) | High Yield Debt
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17	29
Significant Observable Inputs (Level 2) | Defined Benefit Plan, Debt Security
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 179	300
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2
Significant Unobservable Inputs (Level 3) | Mutual Funds Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2
Significant Unobservable Inputs (Level 3) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 2