Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Pre-Tax Amounts Included in Accumulated OCI (Details)

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Employee Benefit Plans - Pre-Tax Amounts Included in Accumulated OCI (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]    
Net Actuarial (Gain) Loss $ 6,881 $ 6,070
Transition Obligation 32 63
Prior Service Cost (Credits) 96 142
Amounts Recognized in Accumulated OCI 7,009 6,275
Qualified Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net Actuarial (Gain) Loss 6,743 5,461
Transition Obligation 0 0
Prior Service Cost (Credits) 67 98
Amounts Recognized in Accumulated OCI 6,810 5,559
Nonqualified and Other Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net Actuarial (Gain) Loss 409 656
Transition Obligation 0 0
Prior Service Cost (Credits) (7) (15)
Amounts Recognized in Accumulated OCI 402 641
Postretirement Health and Life Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net Actuarial (Gain) Loss (59) (27)
Transition Obligation 32 63
Prior Service Cost (Credits) 33 58
Amounts Recognized in Accumulated OCI 6 94
Non-U.S. Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net Actuarial (Gain) Loss (212) (20)
Transition Obligation 0 0
Prior Service Cost (Credits) 3 1
Amounts Recognized in Accumulated OCI $ (209) $ (19)