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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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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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

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