Retirement Benefits (Weighted Average Assumptions Used In The Calculation Of Net Periodic Pension Cost) (Details)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
U.S. [Member]
Discount rate	5.10%	5.70%	7.60%
Expected return on plan assets	8.80%	8.80%	8.80%
Rate of compensation increase	4.00%	4.30%	4.30%
International [Member]
Discount rate	4.90%	5.50%	6.50%
Expected return on plan assets	6.60%	7.30%	7.40%
Rate of compensation increase	3.80%	3.70%	4.40%