Quarterly report pursuant to Section 13 or 15(d)

Pension and Postretirement Plans (Details)

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Pension and Postretirement Plans (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Qualified Pension Plans [Member]
       
Components of net periodic benefit cost (income)        
Service cost $ 104 $ 95 $ 212 $ 198
Interest cost 185 187 373 374
Expected return on plan assets (324) (315) (649) (631)
Amortization of prior service cost (credits) 4 7 10 14
Amortization of net actuarial loss (gain) 93 92 194 181
Net periodic benefit cost (income) 62 66 140 136
Nonqualified and Other Pension Plans [Member]
       
Components of net periodic benefit cost (income)        
Service cost 1 1 1 2
Interest cost 37 44 76 85
Expected return on plan assets (35) (34) (70) (69)
Amortization of prior service cost (credits) (2) (2) (4) (4)
Amortization of net actuarial loss (gain) 3 3 8 3
Recognized termination and settlement benefit costs 3 3 3 13
Net periodic benefit cost (income) 7 15 14 30
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Best estimate for contribution 103   103  
Contribution made under group annuity contract     66  
Postretirement Health and Life Plans [Member]
       
Components of net periodic benefit cost (income)        
Service cost 3 3 7 7
Interest cost 19 23 40 45
Expected return on plan assets (2) (3) (4) (5)
Amortization of transition obligation 8 8 16 16
Amortization of prior service cost (credits)   3 2 3
Amortization of net actuarial loss (gain) (10) (17) (9) (25)
Net periodic benefit cost (income) 18 17 52 41
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Best estimate for contribution 121   121  
Contribution made under group annuity contract     61  
Non-U.S. Pension Plans [Member]
       
Components of net periodic benefit cost (income)        
Service cost 10 7 21 14
Interest cost 23 20 48 40
Expected return on plan assets (27) (23) (56) (45)
Net periodic benefit cost (income) 6 4 13 9
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Best estimate for contribution 101   101  
Contribution made under group annuity contract     $ 79