XML 77 R96.htm IDEA: XBRL DOCUMENT

Transactions with Related Parties (Details) (Alabama Gas Corporation, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Alabama Gas Corporation
Related Party Transaction [Line Items]
Net trade receivables from affiliates	$ 5.7	$ 2.8
Interest expense in affiliated company	$ 0.3	$ 0.4	$ 0.3

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

+ References+ Details