Defined Benefit Pension and Other Postretirement Plans (Details) - USD ($)	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Pension Benefits
Defined Benefit Plan Disclosure
Contribution made to Pension Plan	$ 7,402,000	$ 8,348,000
Expected contribution to pensions plans in the remainder of current fiscal year	2,500,000
VEBA
Defined Benefit Plan Disclosure
Contribution made to Pension Plan	$ 0	$ 0