v2.4.0.6
Pension, Retiree Medical and Savings Plans (Components of Benefit Expense) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 407 $ 350 $ 299
Interest cost 534 547 506
Expected return on plan assets (796) (704) (643)
Amortization of prior service cost/(credit) 17 14 12
Amortization of net loss 259 145 119
Gross total 421 352 293
Settlement/curtailment loss/(gain) (a) 185 [1] (8) [1] (2) [1]
Special termination benefits 8 71 45
Total 614 415 336
International [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 100 95 81
Interest cost 115 117 106
Expected return on plan assets (146) (136) (123)
Amortization of prior service cost/(credit) 1 2 2
Amortization of net loss 53 40 24
Gross total 123 118 90
Settlement/curtailment loss/(gain) (a) 4 [1] 30 [1] 1 [1]
Special termination benefits 1 1 3
Total 128 149 94
Retiree Medical Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 50 51 54
Interest cost 65 88 93
Expected return on plan assets (22) (14) (1)
Amortization of prior service cost/(credit) (26) (28) (22)
Amortization of net loss    12 9
Gross total 67 109 133
Settlement/curtailment loss/(gain) (a)    [1]    [1] (62) [1]
Special termination benefits 5 1 3
Total $ 72 $ 110 $ 74
[1] Includes pension lump sum settlement charge of $195 million in 2012. This charge is reflected in items affecting comparability (see “Items Affecting Comparability” in Management’s Discussion and Analysis of Financial Condition and Results of Operations).