Annual report pursuant to Section 13 and 15(d)

Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Detail)

v2.4.0.6
Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
U.S. Pension Benefits
      
Net Periodic Cost:      
Service cost $ 870 $ 723 $ 689
Interest cost 1,309 1,199 1,130
Expected return on assets (1,835) (1,381) (1,151)
Amortization of:      
Transition obligation     4
Prior service cost 171 172 178
Actuarial (gain) loss 736 70  
Other     3
Net periodic benefit cost 1,251 783 853
U.S. Postretirement Medical Benefits
      
Net Periodic Cost:      
Service cost 89 86 85
Interest cost 207 214 211
Expected return on assets (16) (22) (27)
Amortization of:      
Prior service cost 7 4 6
Net periodic benefit cost 287 282 275
International Pension Benefits
      
Net Periodic Cost:      
Service cost 34 24 17
Interest cost 39 34 28
Expected return on assets (43) (36) (26)
Amortization of:      
Prior service cost 1 1 1
Actuarial (gain) loss 91 42 16
Other   6 1
Net periodic benefit cost $ 122 $ 71 $ 37