Pension, Retiree Medical and Savings Plans (Estimated Amounts to be Amortized from Accumulated Other Comprehensive Loss into Benefit Expense in 2012 for Pension and Retiree Medical Plans) (Details) $ in Millions	Dec. 30, 2017 USD ($)
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss/(gain)	$ 179
Prior service cost/(credit)	3
Total	182
International
Defined Benefit Plan Disclosure [Line Items]
Net loss/(gain)	46
Total	46
Retiree Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Net loss/(gain)	(10)
Prior service cost/(credit)	(20)
Total	$ (30)