Short-Term Debt and Credit Facilities (Details) (USD $) In Millions, unless otherwise specified				3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2014 OGE Energy [Member]		Mar. 31, 2014 OG&E [Member]
Line of Credit Facility [Line Items]
Short-term debt	$ 377.8		$ 439.6
Line of Credit Facility [Abstract]
Aggregate Commitment	1,150.0			750.0	[1]	400.0	[2]
Amount Outstanding	379.8	[3]		377.8	[1],[3]
Weighted Average Interest Rate	0.28%			0.28%	[1],[4]	0.47%	[2],[4]
Maturity				Dec. 13, 2017		Dec. 13, 2017
Letters of Credit Outstanding, Amount						2.0	[2],[3]
Short Term Borrowing Capacity That Has Regulatory Approval						$ 800
Period For Which Regulatory Approval Has Been Given to Acquire Short Term Debt						2 years

[1] This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

[2] This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

[3] Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at March 31, 2014.

[4] Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.