Derivatives and Other Hedging Instruments (Derivatives Not Designated in Hedging Relationships) (Narrative) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Foreign Currency Contracts [Member]
Notional amount	$ 8,242	$ 7,449
Cross Currency Interest Rate Contract [Member]
Notional amount	1,074	0
Agricultural Commodity Contracts [Member]
Notional amount	168	310
Energy Feedstock Contracts [Member]
Notional amount	$ 12	$ 0