Energy Services Accounts Receivable Securitization Facility - Narrative (Details) (USD $) In Millions, unless otherwise specified	7 Months Ended	9 Months Ended				5 Months Ended
	May 31, 2014 Maximum	Jun. 30, 2014 Energy Services	Jun. 30, 2013 Energy Services	Jun. 30, 2014 Energy Services Funding Corporation	Jun. 30, 2013 Energy Services Funding Corporation	Oct. 31, 2014 Scenario, Forecast Maximum
Accounts, Notes, Loans and Financing Receivable
Receivables facility	$ 150					$ 75
Sale of trade receivables		1,073.1	766.1
Sale of undivided interests in its trade receivables to the commercial paper conduit				196.0	224.0
Outstanding balance of trade receivables				57.7	58.2
Outstanding balance of trade receivables sold				$ 0	$ 9.5