Pension, Retiree Medical And Savings Plans (Components Of Benefit Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 350	$ 299	$ 238
Interest cost	547	506	373
Expected return on plan assets	(704)	(643)	(462)
Amortization of prior service cost/(credit)	14	12	12
Amortization of net loss	145	119	110
Gross total	352	293	271
Settlement/curtailment (gain)/loss	(8)	(2)	(13)
Special termination benefits	71	45
Total	415	336	258
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	95	81	54
Interest cost	117	106	82
Expected return on plan assets	(136)	(123)	(105)
Amortization of prior service cost/(credit)	2	2	2
Amortization of net loss	40	24	9
Gross total	118	90	42
Settlement/curtailment (gain)/loss	30	1	3
Special termination benefits	1	3
Total	149	94	45
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	51	54	44
Interest cost	88	93	82
Expected return on plan assets	(14)	(1)
Amortization of prior service cost/(credit)	(28)	(22)	(17)
Amortization of net loss	12	9	11
Gross total	109	133	120
Settlement/curtailment (gain)/loss		(62)
Special termination benefits	1	3
Total	$ 110	$ 74	$ 120