Energy Services Accounts Receivable Securitization Facility - Narrative (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended				5 Months Ended	7 Months Ended
	Mar. 31, 2014 Energy Services	Mar. 31, 2013 Energy Services	Mar. 31, 2014 Energy Services Funding Corporation	Mar. 31, 2013 Energy Services Funding Corporation	Oct. 31, 2014 Maximum Forecast	May 31, 2014 Maximum Forecast
Accounts, Notes, Loans and Financing Receivable
Receivables facility					$ 75	$ 150
Sale of trade receivables	551.8	524.3
Sale of undivided interests in its trade receivables to the commercial paper conduit			251.0	179.0
Outstanding balance of trade receivables			124.1	82.6
Outstanding balance of trade receivables sold			$ 10.5	$ 11.0