Retirement Benefits (Details 4)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Equity Securities [Member]
Asset Allocation
Minimum	30.00%
Maximum	65.00%
Target Allocation	55.00%
As of the balance sheet date	50.00%	53.00%
Debt Securities [Member]
Asset Allocation
Minimum	35.00%
Maximum	50.00%
Target Allocation	40.00%
As of the balance sheet date	42.00%	40.00%
Other Security [Member]
Asset Allocation
Minimum	0.00%
Maximum	35.00%
Target Allocation	5.00%
As of the balance sheet date	8.00%	7.00%