Employee Retirement Plans (Details 1)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011		Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pension Benefit [Member]
Weighted-average assumption:
Discount rate - benefit obligations		5.30%	[1]	5.20%	4.20%	5.30%	[1]
Discount rate	5.00%	5.50%		4.20%	5.30%	5.00%	[1]
Expected return on plan assets				7.75%	7.75%	8.00%	[1]
Rate of increase in salary levels				3.25%	3.25%	3.50%	[1]
Other Postretirement Benefits [Member]
Weighted-average assumption:
Discount rate - benefit obligations		5.30%				5.30%
Discount rate					5.30%	5.00%
Expected return on plan assets				5.00%	5.20%	5.50%
Rate of increase in salary levels				3.25%	3.25%	3.50%
Minimum [Member] | Other Postretirement Benefits [Member]
Weighted-average assumption:
Discount rate - benefit obligations				5.10%	4.10%
Discount rate				4.10%
Maximum [Member] | Other Postretirement Benefits [Member]
Weighted-average assumption:
Discount rate - benefit obligations				5.40%	4.30%
Discount rate				4.30%

[1] Effective December 31, 2010, we merged our then-existing two U.S. defined benefit pension plans (“U.S. Pension Plans Merger”) to form the U.S. Pension Plan. The discount rates used during Fiscal 2011 to calculate pension expense were rates of 5.0% through December 31, 2010 (the date of the U.S. Pension Plans Merger) and 5.5% for the remainder of Fiscal 2011.