Pension, Retiree Medical And Savings Plans (Selected Financial Information For Pension And Retiree Medical Plans) (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]
Liability at beginning of year	$ 9,851	$ 6,606
Acquisitions/(divestitures)	11	2,161
Service cost	350	299	238
Interest cost	547	506	373
Plan amendments	21	28
Experience loss/(gain)	1,484	583
Settlement/curtailment gain	(20)	(2)
Special termination benefits	71	45
Liability at end of year	11,901	9,851	6,606
Fair value at beginning of year	8,870	5,420
Acquisitions/(divestitures)	11	1,633
Actual return on plan assets	542	943
Employer contributions/funding	63	1,249
Benefit payments	(414)	(375)
Fair value at end of year	9,072	8,870	5,420
Funded status	(2,829)	(981)
Other assets		47
Other current liabilities	(91)	(54)
Other liabilities	(2,738)	(974)
Net amount recognized	(2,829)	(981)
Net loss	4,217	2,726
Prior service cost/(credit)	122	117
Total	4,339	2,843
Change in discount rate	1,710	556
Employee-related assumption changes	(140)	4
Liability-related experience different from assumptions	(85)	43
Actual asset return different from expected return	162	(300)
Amortization of losses	(147)	(119)
Other, including foreign currency adjustments	(9)	(21)
Total	1,491	163
Liability at end of year for service to date	11,205	9,163
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability at beginning of year	2,142	1,709
Acquisitions/(divestitures)	(63)	90
Service cost	95	81	54
Interest cost	117	106	82
Plan amendments	(16)
Participant contributions	3	3
Experience loss/(gain)	224	213
Settlement/curtailment gain	(15)	(3)
Special termination benefits	1	3
Foreign currency adjustment	(41)	(18)
Other	3	27
Liability at end of year	2,381	2,142	1,709
Fair value at beginning of year	1,896	1,561
Acquisitions/(divestitures)	(1)	52
Actual return on plan assets	79	164
Employer contributions/funding	176	215
Participant contributions	3	3
Benefit payments	(69)	(69)
Settlement	(30)	(2)
Foreign currency adjustment	(23)	(28)
Fair value at end of year	2,031	1,896	1,561
Funded status	(350)	(246)
Other assets	55	66
Other current liabilities	(1)	(10)
Other liabilities	(404)	(302)
Net amount recognized	(350)	(246)
Net loss	977	767
Prior service cost/(credit)	(2)	17
Total	975	784
Change in discount rate	302	213
Employee-related assumption changes	(51)	(4)
Liability-related experience different from assumptions	(27)	5
Actual asset return different from expected return	57	(41)
Amortization of losses	(55)	(24)
Other, including foreign currency adjustments	(16)	(7)
Total	210	142
Liability at end of year for service to date	1,921	1,743
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability at beginning of year	1,770	1,359
Acquisitions/(divestitures)		396
Service cost	51	54	44
Interest cost	88	93	82
Plan amendments	3	(132)
Experience loss/(gain)	(239)	95
Special termination benefits	1	3
Foreign currency adjustment	(1)	2
Liability at end of year	1,563	1,770	1,359
Fair value at beginning of year	190	13
Actual return on plan assets		7
Employer contributions/funding	110	270
Benefit payments	(110)	(100)
Fair value at end of year	190	190	13
Funded status	(1,373)	(1,580)
Other current liabilities	(124)	(145)
Other liabilities	(1,249)	(1,435)
Net amount recognized	(1,373)	(1,580)
Net loss	32	270
Prior service cost/(credit)	(118)	(150)
Total	(86)	120
Change in discount rate	115	101
Employee-related assumption changes	(125)	8
Liability-related experience different from assumptions	(210)	(22)
Actual asset return different from expected return	14	(6)
Amortization of losses	(12)	(9)
Other, including foreign currency adjustments	(20)	8
Total	$ (238)	$ 80