Postretirement and Other Employee Benefits (Details 2) $ in Millions	9 Months Ended
	May. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans	$ 2.6
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected cash contributions to funded pension plans during the fiscal year ended August 31, 2015	3.4
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected cash contributions to funded pension plans during the fiscal year ended August 31, 2015	$ 4.2