Disclosures About Fair Value of Financial Instruments (Details) Gain (Loss) Recognized in Income on Derivative (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Futures | Cost of Sales, Canola Oil and Meal
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ (3,469)	[1]
Futures | Operating and Other Costs
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	(708)	[2]
Forwards | Cost of Sales, Canola Oil and Meal
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	1,637	[1]
Forwards | Operating and Other Costs
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	98	[2]
Swaps | Cost of Sales, Canola Oil and Meal
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	3,933	[1]
Swaps | Operating and Other Costs
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ 1,884	[2]	$ (2,511)	[2]

[1] Represents the activity post-completion of the Company’s canola processing plant.

[2] Represents the activity pre-completion of the Company’s canola processing plant.