Retirement Benefits (Details 3)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
U.S. Pension Benefit Plans [Member]
Net periodic benefit cost assumptions
Discount rate	4.50%	5.05%	4.15%
Expected return on plan assets	7.50%	7.50%	8.00%
Compensation increase rate	3.75%	3.75%	4.00%
Net benefit obligation assumptions
Discount rate	4.55%	4.50%
Compensation increase rate	3.75%	3.75%
Non-U.S. Pension Benefit Plans [Member]
Net periodic benefit cost assumptions
Discount rate	3.01%	3.69%	3.37%
Expected return on plan assets	5.31%	5.33%	5.42%
Compensation increase rate	3.16%	3.11%	3.03%
Net benefit obligation assumptions
Discount rate	2.67%	3.01%
Compensation increase rate	3.11%	3.16%
U.S. Other Postretirement Benefit Plans [Member]
Net periodic benefit cost assumptions
Discount rate	3.65%	4.60%	3.85%
Net benefit obligation assumptions
Discount rate	3.85%	3.65%
Health care cost trend rate	7.00%	7.00%
Non-U.S. Other Postretirement Benefit Plans [Member]
Net periodic benefit cost assumptions
Discount rate	3.50%	4.20%	3.80%
Net benefit obligation assumptions
Discount rate	3.60%	3.50%
Health care cost trend rate	5.39%	5.83%