Retirement Benefits (Schedule of Assumptions Used) (Details)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Pension Plan [Member] | United States [Member]
Weighted-average assumptions to determine benefit obligation:
Discount rate	5.70%	3.05%	2.75%
Weighted-average assumptions to determine periodic benefit costs:
Discount rate	3.05%	2.75%	3.25%
Long-term rate of return on plan assets	5.00%	7.15%	7.39%
Defined Benefit Pension Plan [Member] | United Kingdom
Weighted-average assumptions to determine benefit obligation:
Discount rate	5.35%	2.05%	1.62%
Rate of compensation increase	4.00%	3.80%	3.30%
Weighted-average assumptions to determine periodic benefit costs:
Long-term rate of return on plan assets	3.80%	4.00%	4.75%
Discount rate - service cost	2.15%	1.71%	1.79%
Discount rate - interest cost	1.83%	1.41%	1.59%
Rate of compensation increase	4.00%	3.30%	3.50%
Defined Benefit Pension Plan [Member] | Japan
Weighted-average assumptions to determine benefit obligation:
Discount rate	1.60%	0.92%	1.10%
Rate of compensation increase	2.00%	2.00%	2.00%
Weighted-average assumptions to determine periodic benefit costs:
Long-term rate of return on plan assets	2.00%	2.00%	2.50%
Discount rate - service cost	1.13%	1.33%	0.72%
Discount rate - interest cost	0.65%	0.74%	0.31%
Rate of compensation increase	2.25%	2.00%	2.00%
Defined Benefit Pension Plan [Member] | Germany [Member]
Weighted-average assumptions to determine benefit obligation:
Discount rate	3.97%	1.36%	0.97%
Rate of compensation increase	2.50%	2.50%	2.50%
Weighted-average assumptions to determine periodic benefit costs:
Discount rate - service cost	1.54%	1.11%	1.01%
Discount rate - interest cost	1.06%	0.76%	0.56%
Rate of compensation increase	2.50%	2.50%	2.50%
Other Postretirement Benefit Plans [Member]
Weighted-average assumptions to determine benefit obligation:
Discount rate	5.70%	2.80%	2.45%
Weighted-average assumptions to determine periodic benefit costs:
Discount rate	2.80%	2.45%	3.05%