Commitments and Contingencies (Details) (USD $)		9 Months Ended		3 Months Ended	7 Months Ended	10 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 McClain Plant [Member]	Sep. 30, 2013 Redbud Plant [Member]	Mar. 31, 2014 OG&E minimum fuel purchase commitments [Member]	Oct. 31, 2013 OG&E minimum fuel purchase commitments [Member]	Oct. 31, 2013 OG&E minimum fuel purchase commitments [Member]	Sep. 30, 2013 OG&E Wind Energy Purchase Power Lawsuit [Member]
Long-term Purchase Commitment [Line Items]
Percentage of OG&E's projected 2013 requirements					84.00%	26.10%
Percentage of OG&E's Projected 2014 Requirements				25.50%
Factored-Fired Hours		128,000	24,000
Factored-Fired Starts		3,600
Loss Contingency, Damages Sought, Value							$ 100,000
Loss Contingency, Range of Possible Loss, Minimum							0
Loss Contingency, Range of Possible Loss, Maximum							10,000,000
Estimated Environmental Capital Costs	1,000,000,000
Potential Penalty Under the Federal Clean Air Act	$ 37,500