Fair Value of Pension Plan Assets (Detail) (North America, Pension Benefits, USD $) In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,039	$ 986	$ 972
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	25
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	78
Equity Securities | U S Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24	18
Equity Securities | Us Small And Mid Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	4
Equity Securities | International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	58	56
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	670	518
Fixed Income Securities | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	612	459
Fixed Income Securities | US Treasury Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19	18
Fixed Income Securities | Other Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39	41
All Other Securities | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	255	353
All Other Securities | Other Including Plan Receivables And Payables
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	12
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	96	115
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		25
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	86	78
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | U S Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24	18
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Us Small And Mid Cap
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 | International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	58	56
Quoted Prices in Active Markets for Identical Assets (Level 1) | All Other Securities | Other Including Plan Receivables And Payables
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	12
Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	943	871
Significant Observable Inputs (Level 2) | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18
Significant Observable Inputs (Level 2) | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	670	518
Significant Observable Inputs (Level 2) | Fixed Income Securities | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	612	459
Significant Observable Inputs (Level 2) | Fixed Income Securities | US Treasury Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19	18
Significant Observable Inputs (Level 2) | Fixed Income Securities | Other Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39	41
Significant Observable Inputs (Level 2) | All Other Securities | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 255	$ 353