STATEMENTS OF CAPITALIZATION (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Garfield Industrial Authority Bond, Due January 1, 2025 [Member] Debentures Subject to Mandatory Redemption [Member]	Dec. 31, 2013 Muskogee Industrial Authority Bond, Due January 1, 2025 [Member] Debentures Subject to Mandatory Redemption [Member]	Dec. 31, 2013 Muskogee Industrial Authority Bond, Due June 1, 2027 [Member] Debentures Subject to Mandatory Redemption [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due January 15, 2016 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due July 15, 2017 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due September 1, 2018 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due January 15, 2019 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due July 15, 2027 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due April 15, 2028 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due August 1, 2034 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due January 15, 2036 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due February 1, 2038 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Series Due June 1, 2040 [Member]	Dec. 31, 2013 Senior Notes [Member] OG&E [Member] Senior Notes due May 15, 2041 [Member]	Dec. 31, 2013 Long-term Debt [Member] OG&E [Member] Due August 31, 2062 [Member]
Common Stock, Par or Stated Value Per Share	$ 2.50	$ 2.50
Common Stock, Shares Authorized	100
Common Stock, Shares, Outstanding	40.4	40.4
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum			0.18%	0.10%	0.10%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum			0.34%	0.39%	0.30%
Debt Instrument, Maturity Date						Jan. 15, 2016	Jul. 15, 2017	Sep. 01, 2018	Jan. 15, 2019	Jul. 15, 2027	Apr. 15, 2028	Aug. 01, 2034	Jan. 15, 2036	Feb. 01, 2038	Jun. 01, 2040	May 15, 2041	Aug. 31, 2062