Retirement Benefit Plans (Details 7)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	100.00%	100.00%
U.S. equities [Member]
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	54.00%	54.00%
Asset Allocations Range Minimum	30.00%
Asset Allocations Range Maximum	70.00%
Non-U.S. equities [Member]
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	8.00%	8.00%
Asset Allocations Range Minimum	0.00%
Asset Allocations Range Maximum	20.00%
U.S. debt securities [Member]
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	35.00%	35.00%
Asset Allocations Range Minimum	20.00%
Asset Allocations Range Maximum	70.00%
Non-U.S. debt securities [Member]
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	1.00%	1.00%
Asset Allocations Range Minimum	0.00%
Asset Allocations Range Maximum	10.00%
Other securities [Member]
Asset Allocation Range provides flexibility for the Plan's investments
Percent of Plan Assets	2.00%	2.00%
Asset Allocations Range Minimum	0.00%
Asset Allocations Range Maximum	60.00%