Benefit Plans (Details 3)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
U.S. plans [Member]
Net Cost
Discount rate	5.20%	5.90%	8.00%
Expected return on plan assets	8.00%	8.00%	8.00%
Rate of compensation increase	4.50%	4.50%	4.50%
Benefit Obligation
Discount rate	4.90%	5.20%	5.90%
Rate of compensation increase	4.25%	4.50%	4.50%
Foreign plans [Member]
Net Cost
Discount rate	4.68%	5.63%	6.03%
Expected return on plan assets	6.31%	6.38%	6.45%
Rate of compensation increase	3.56%	3.35%	3.56%
Benefit Obligation
Discount rate	5.26%	4.68%	5.63%
Rate of compensation increase	3.61%	3.56%	3.35%