Derivatives and Other Hedging Instruments (Cash Flow Hedges) (Narrative) (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011 Cash Flow Hedging [Member]	Sep. 30, 2011 Foreign Exchange Contract [Member]	Dec. 31, 2010 Foreign Exchange Contract [Member]	Sep. 30, 2011 Energy Feedstock Contracts [Member]	Dec. 31, 2010 Energy Feedstock Contracts [Member]	Sep. 30, 2011 Agricultural Commodity Contracts [Member]	Dec. 31, 2010 Agricultural Commodity Contracts [Member]
Notional amount		$ 1,111	$ 1,220	$ 61	$ 151	$ 120	$ 297
Portion of ending balance expected to be reclassified into earnings over the next twelve months, pre-tax	57
Portion of ending balance expected to be reclassified into earnings over the next twelve months, tax	(19)
Portion of ending balance expected to be reclassified into earnings over the next twelve months, after-tax	$ 38