v2.4.0.6
Fair Value Measurement - FV of Fin. Instruments (Details 2) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Financial Assets [Abstract]    
Deferred compensation investments $ 309 $ 305
Carrying Amount [Member]
   
Financial Assets [Abstract]    
Deferred compensation investments 309 305
Commodity derivatives, assets 181 221
Total loans and advances - related parties 1,629 1,697
Financial Liabilities [Abstract]    
Total debt, excluding capital leases 21,654 21,709
Total joint venture acquisition obligation 3,392 3,582
Commodity derivatives, liability 209 199
Fair Value [Member]
   
Financial Assets [Abstract]    
Deferred compensation investments 309 305
Commodity derivatives, assets 181 221
Total loans and advances - related parties 1,820 1,916
Financial Liabilities [Abstract]    
Total debt, excluding capital leases 25,855 26,349
Total joint venture acquisition obligation 3,740 3,968
Commodity derivatives, liability $ 209 $ 199