Equity Method Investments (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Jan. 01, 2012	Sep. 30, 2012
Blue Flint Ethanol LLC
Equity Method Investee
Proceeds from sale of interest in equity method investee	$ 18.5
Equity earnings in Blue Flint since investment	15.0
Non-cash gain (loss) related to sale of interest in equity method investee		(6.3)
Evonik Industries AG
Equity Method Investee
Non-cash gain (loss) related to sale of interest in equity method investee		$ (3.2)