Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Amounts Recognized on the Balance Sheet (Details)

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Employee Benefit Plans - Amounts Recognized on the Balance Sheet (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]    
Other Assets $ 145,686 $ 182,124
Qualified Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 246 1,710
Accrued Expenses And Other Liabilities (67) 0
Net Amount Recognized at December 31 179 1,710 [1]
Nonqualified and Other Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 1,096 809
Accrued Expenses And Other Liabilities (1,172) (1,198)
Net Amount Recognized at December 31 (76) (389) [1]
Postretirement Health and Life Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 0 0
Accrued Expenses And Other Liabilities (1,528) (1,596)
Net Amount Recognized at December 31 (1,528) (1,596) [1]
Non-U.S. Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 342 33
Accrued Expenses And Other Liabilities (304) (258)
Net Amount Recognized at December 31 $ 38 $ (225) [1]
[1] The measurement date for the Qualified Pension Plans, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported.