XML 163 R29.htm IDEA: XBRL DOCUMENT v3.2.0.727
ALAGASCO ACQUISITION - Alabama Gas Corporation (Details) - Alagasco - USD ($)
$ in Millions
Jan. 06, 2015
Sep. 02, 2014
Business Acquisition [Line Items]    
Percentage of voting interest acquired   100.00%
Total consideration transferred   $ 1,600.0
Payments to acquire businesses, net of cash acquired $ 1,313.8 $ 1,305.2
Final reconciliation of net assets payments to acquire businesses $ 8.6