Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details)

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Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Qualified Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Plans with ABO in Excess of Plan Assets, PBO $ 7,171 $ 0
Plans with ABO in Excess of Plan Assets, ABO 7,171 0
Plans with ABO in Excess of Plan Assets, Fair Value of Plan Assets 7,114 0
Plans with PBO in Excess of Plan Assets, PBO 7,171 6,624
Plans with PBO in Excess of Plan Assets, Fair Value of Plan Assets 7,114 6,557
Non-U.S. Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Plans with ABO in Excess of Plan Assets, PBO 883 732
Plans with ABO in Excess of Plan Assets, ABO 843 698
Plans with ABO in Excess of Plan Assets, Fair Value of Plan Assets 510 428
Plans with PBO in Excess of Plan Assets, PBO 896 732
Plans with PBO in Excess of Plan Assets, Fair Value of Plan Assets 522 428
Nonqualified and Other Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Plans with ABO in Excess of Plan Assets, PBO 1,182 1,174
Plans with ABO in Excess of Plan Assets, ABO 1,181 1,173
Plans with ABO in Excess of Plan Assets, Fair Value of Plan Assets 2 2
Plans with PBO in Excess of Plan Assets, PBO 1,182 1,174
Plans with PBO in Excess of Plan Assets, Fair Value of Plan Assets $ 2 $ 2