Discontinued Operations (Additional Information) (Details 1) - USD ($) $ in Millions		12 Months Ended
	Dec. 17, 2013	Aug. 31, 2015	Aug. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for the sale of a business preferred stock			$ 49.8
Aftermarket services (AMS) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for the sale of a business	$ 725.0
Cash consideration for the sale of a business	675.0
Consideration for the sale of a business preferred stock	$ 50.0
Accretes dividends at an annual rate	8.00%
Redeemable period	9 years
Reduction in final purchase price	$ 100.2
Net revenue		$ 14.6