Income Taxes (Details 1)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Effective Tax Rate Reconciliation
Statutory tax rate	35.00%	35.00%	35.00%
State and local income taxes	0.60%	0.90%	0.80%
Non-United States taxes	(8.60%)	(7.90%)	(9.50%)
Tax effect of foreign dividends	0.10%	(0.20%)	0.50%
Foreign currency transaction loss	(0.80%)	0.00%	0.00%
Research and development tax credit	(2.00%)	(0.60%)	(0.10%)
Change in valuation allowances	(0.60%)	(0.50%)	(0.10%)
Domestic manufacturing deduction	(1.20%)	(1.20%)	(1.10%)
Adjustments for prior period tax matters	0.40%	0.50%	1.00%
Other	(0.30%)	0.60%	0.60%
Effective income tax rate	22.60%	26.60%	27.10%