XML 113 R82.htm IDEA: XBRL DOCUMENT v2.4.0.6
Retirement Benefits (Schedule Of Amounts Recognized In Other Comprehensive Loss) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) $ 3,943 $ 4,179
Prior service cost (credit) 301 68
Amounts recognized in other comprehensive loss 4,244 4,247
Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) (78) (181)
Prior service cost (credit) (1,844) (179)
Amounts recognized in other comprehensive loss $ (1,922) $ (360)