v2.4.0.6
Pension And Other Postretirement Benefits (Assets Recorded In Balance Sheet And Other Comprehensive Income) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]    
Postretirement benefits reserves $ (24,994) $ (19,367)
Pension Benefits - U.S. [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Balance at December 31 (6,379) [1] (4,172) [1]
Other assets 1 1
Current liabilities (237) (257)
Postretirement benefits reserves (6,143) (3,916)
Total recorded (6,379) (4,172)
Net actuarial loss/(gain) 6,475 5,028
Prior service cost 74 83
Total recorded in accumulated other comprehensive income 6,549 5,111
Pension Benefits - Non-U.S. [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Balance at December 31 (11,951) [1] (8,957) [1]
Other assets 245 400
Current liabilities (346) (336)
Postretirement benefits reserves (11,850) (9,021)
Total recorded (11,951) (8,957)
Net actuarial loss/(gain) 11,170 7,795
Prior service cost 745 674
Total recorded in accumulated other comprehensive income 11,915 8,469
Other Postretirement Benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Balance at December 31 (7,342) [1] (6,773) [1]
Current liabilities (341) (343)
Postretirement benefits reserves (7,001) (6,430)
Total recorded (7,342) (6,773)
Net actuarial loss/(gain) 2,291 1,985
Prior service cost 119 154
Total recorded in accumulated other comprehensive income $ 2,410 $ 2,139
[1] Fair value of assets less benefit obligation shown on the preceding page.