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Fair value of Plan Assets (Detail) - Europe - USD ($) $ in Millions | Dec. 26, 2015 | Dec. 27, 2014 | Dec. 28, 2013
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | $ 240 | $ 257 | $ 232
Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total |  | 1 |
Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 120 | 132 |
Equity Securities | Developed Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 70 | 81 |
Equity Securities | Emerging Markets Equity Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 15 | 27 |
Equity Securities | Mutual Funds Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 8 | 7 |
Equity Securities | Mutual Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 17 |
Fixed Income Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 120 | 124 |
Fixed Income Securities | UK debt funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 25 | 21 |
Fixed Income Securities | Liability Term Matching Debt Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 71 | 80 |
Fixed Income Securities | Emerging Markets Debt Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 8 | 9 |
Fixed Income Securities | High Yield Debt |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 16 | 14 |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 85 | 109 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total |  | 1 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 85 | 108 |
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 | 70 | 81 |
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 | 15 | 27 |
Significant Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 147 | 141 |
Significant Observable Inputs (Level 2) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 17 |
Significant Observable Inputs (Level 2) | Equity Securities | Mutual Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 27 | 17 |
Significant Observable Inputs (Level 2) | Fixed Income Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 120 | 124 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | UK debt funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 25 | 21 |
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 | 71 | 80 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | Emerging Markets Debt Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 8 | 9 |
Significant Observable Inputs (Level 2) | Fixed Income Securities | High Yield Debt |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 16 | 14 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 8 | 7 |
Significant Unobservable Inputs (Level 3) | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | 8 | 7 |
Significant Unobservable Inputs (Level 3) | Equity Securities | Mutual Funds Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets, total | $ 8 | $ 7 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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