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Employee Benefit Plans - Additional Information (Detail) - 9 months ended Sep. 24, 2016
£ in Millions, $ in Millions
USD ($)
GBP (£)
North America    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit pension plan employer contribution $ 2  
Pension and other postretirement contributions, remainder of fiscal year $ 1  
Europe    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit pension plan employer contribution | £   £ 20