Income Taxes (Effective Tax Rate Reconciliation) (Details)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	1.10%	1.00%	0.50%
Income from equity affiliates	(2.40%)	(3.00%)	(3.90%)
Foreign tax differentials	(7.00%)	(6.60%)	(8.20%)
U.S. taxes on foreign earnings	(2.30%)	(1.60%)	(1.70%)
Domestic production activities	(0.80%)	(0.90%)	(0.70%)
Non-deductible goodwill impairment charge	0.00%	0.00%	8.00%
Non-U.S. subsidiary tax election	0.00%	0.00%	(3.80%)
Business separation costs	3.10%	0.20%	0.00%
Other	0.80%	(0.10%)	1.90%
Effective Tax Rate	27.50%	24.00%	27.10%