Financial Instruments, Derivatives and Hedging Activities (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Corn Commodity
Fair value of commodity contracts
Commodity futures contract (in bushels of corn, pounds of soy bean oil or mmbtu of gas)	75,000,000
Soy Bean
Fair value of commodity contracts
Commodity futures contract (in bushels of corn, pounds of soy bean oil or mmbtu of gas)	14,000,000
Natural Gas Commodity
Fair value of commodity contracts
Commodity futures contract (in bushels of corn, pounds of soy bean oil or mmbtu of gas)	16,000,000
Derivatives designated as hedging instruments
Fair value of commodity contracts
Fair value of assets	$ 4	$ 5
Fair value of liabilities	49	40
Derivatives designated as hedging instruments | Commodity and foreign currency contracts | Accounts receivable-net
Fair value of commodity contracts
Fair value of assets	4	5
Derivatives designated as hedging instruments | Commodity and foreign currency contracts | Accounts payable and accrued liabilities
Fair value of commodity contracts
Fair value of liabilities	45	34
Derivatives designated as hedging instruments | Commodity and foreign currency contracts | Non-current liabilities
Fair value of commodity contracts
Fair value of liabilities	$ 4	$ 6