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Fair value of Plan Assets (Detail) - Europe - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | $ 278 | $ 240 | $ 257
Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 25 |  |
Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 60 | 120 |
Equity Securities | Developed Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 19 | 70 |
Equity Securities | Emerging Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 7 | 15 |
Equity Securities | Mutual Funds Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 7 | 8 |
Equity Securities | Mutual Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 27 |
Fixed Income Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 193 | 120 |
Fixed Income Securities | UK debt funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 62 | 25 |
Fixed Income Securities | Liability Term Matching Debt Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 109 | 71 |
Fixed Income Securities | Emerging Markets Debt Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 2 | 8 |
Fixed Income Securities | High Yield Debt |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 20 | 16 |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 51 | 85 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 25 |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 26 | 85 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Developed Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 19 | 70 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Emerging Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 7 | 15 |
Significant Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 220 | 147 |
Significant Observable Inputs (Level 2) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 27 |
Significant Observable Inputs (Level 2) | Equity Securities | Mutual Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 27 |
Significant Observable Inputs (Level 2) | Fixed Income Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 193 | 120 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | UK debt funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 62 | 25 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | Liability Term Matching Debt Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 109 | 71 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | Emerging Markets Debt Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 2 | 8 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | High Yield Debt |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 20 | 16 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 7 | 8 |
Significant Unobservable Inputs (Level 3) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 7 | 8 |
Significant Unobservable Inputs (Level 3) | Equity Securities | Mutual Funds Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | $ 7 | $ 8 |

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