Fair Value of Pension Plan Assets (Detail) - North America - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 870	$ 922	$ 1,039
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	19
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	87
Equity Securities | U S Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29	25
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	60	58
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	437	519
Fixed Income Securities | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	407	485
Fixed Income Securities | US Treasury Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	10
Fixed Income Securities | Other Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	24
All Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	315	297
All Other Securities | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		290
All Other Securities | Other Including Plan Receivables And Payables
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	7
All Other Securities | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	312
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	96	94
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	87
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	29	25
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	60	58
Quoted Prices in Active Markets for Identical Assets (Level 1) | All Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	7
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	3	7
Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	774	828
Significant Observable Inputs (Level 2) | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	19
Significant Observable Inputs (Level 2) | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	437	519
Significant Observable Inputs (Level 2) | Fixed Income Securities | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	407	485
Significant Observable Inputs (Level 2) | Fixed Income Securities | US Treasury Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	10
Significant Observable Inputs (Level 2) | Fixed Income Securities | Other Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	24
Significant Observable Inputs (Level 2) | All Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	312	290
Significant Observable Inputs (Level 2) | All Other Securities | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 290
Significant Observable Inputs (Level 2) | All Other Securities | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 312