Defined Benefit Pension and Other Postretirement Plans (Details) - USD ($)	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution made to Pension and Post-retirement Plans	$ 4,900,000	$ 5,600,000
Expected contribution to pension plan during remainder of fiscal year	5,000,000
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution made to Pension and Post-retirement Plans	$ 0	$ 0