Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended				0 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012 Parent Company [Member]	Mar. 31, 2011 Parent Company [Member]	Mar. 31, 2012 Parent Company [Member]	Mar. 31, 2011 Parent Company [Member]	Mar. 31, 2012 Maximum [Member]	Mar. 31, 2012 Minimum [Member]	May 23, 2012 Petri Baking Products Inc [Member]	Mar. 31, 2012 Alternate Base Rate Based Loan [Member] Maximum [Member]	Mar. 31, 2012 Alternate Base Rate Based Loan [Member] Minimum [Member]	Mar. 31, 2012 LIBOR Based Loan [Member] Maximum [Member]	Mar. 31, 2012 LIBOR Based Loan [Member] Minimum [Member]	May 01, 2012 2010 Revolving Credit Agreement [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity of credit agreement																$ 300.0
Debt instrument basis rate, range												0.75%	0.125%	1.75%	1.125%
Equity interest pledge percentage			65.00%
Credit facility maturity date			May 1, 2017
Commitment fee calculated percentage									0.275%	0.15%
Maximum leverage ratio	3.75		3.75
Covenants description			The covenants include requirements that "EBIT" be at least three times "Consolidated Interest Expense" and that "Total Debt" not exceed 3.75 times "Adjusted EBITDA" (each term as defined in the agreement).
Date of acquisition											May 23, 2012
Business acquisition, cash paid											84
Net sales	$ 1,062.2	$ 917.3	$ 2,228.7	$ 1,869.0	$ 138.1	$ 126.5	$ 283.5	$ 262.3			$ 50.0
Number of employees											240