Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details)

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Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Realized and unrealized gains on financial instruments, net $ (18) $ (59)
Non-Strategic Securities [Member]
   
Realized and unrealized gains on financial instruments, net 140 97
Exchangeable Senior Debentures [Member]
   
Realized and unrealized gains on financial instruments, net (182) (187)
Other [Member]
   
Realized and unrealized gains on financial instruments, net $ 24 $ 31