Retirement Benefits (Schedule of Assumptions Used) (Details)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
United States Pension Plans of US Entity, Defined Benefit [Member]
Weighted-average assumptions to determine benefit obligation at September 30:
Discount rate	4.39%	4.40%	5.15%
Rate of compensation increase		3.50%	3.50%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
Discount rate	4.40%	5.15%	4.10%
Rate of compensation increase		3.50%	3.50%
Long-term rate of return on plan assets	7.62%	7.62%	7.59%
United Kingdom Plan, Defined Benefit [Member]
Weighted-average assumptions to determine benefit obligation at September 30:
Discount rate	3.75%	4.10%	4.50%
Rate of compensation increase	3.40%	3.50%	3.50%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
Discount rate	4.10%	4.50%	4.60%
Rate of compensation increase	3.50%	3.50%	3.90%
Long-term rate of return on plan assets	5.50%	5.50%	5.50%
Japan Plan, Defined Benefit [Member]
Weighted-average assumptions to determine benefit obligation at September 30:
Discount rate	0.97%	1.10%	1.25%
Rate of compensation increase	2.00%	2.00%	2.00%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
Discount rate	1.10%	1.25%	1.50%
Rate of compensation increase	2.00%	2.00%	2.00%
Long-term rate of return on plan assets	3.00%	3.00%	2.80%
Switzerland Plan, Defined Benefit [Member]
Weighted-average assumptions to determine benefit obligation at September 30:
Discount rate			2.25%
Rate of compensation increase			2.00%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
Discount rate		2.25%	1.75%
Rate of compensation increase		2.00%	2.00%
Long-term rate of return on plan assets		2.25%	1.75%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Weighted-average assumptions to determine benefit obligation at September 30:
Discount rate	4.01%	4.40%	5.14%
Weighted-average assumptions to determine periodic benefit costs for years ending September 30:
Discount rate	4.40%	5.14%	4.11%