Common Equity (Tables)

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Basic and diluted earnings per share for the Company were calculated as follows:

	Three Months Ended
	March 31,
(In millions except per share data)	2014		2013
Net Income Attributable to OGE Energy	$	49.3	$	23.1
Average Common Shares Outstanding
Basic average common shares outstanding	198.8		197.8
Effect of dilutive securities:
Contingently issuable shares (performance units)	0.7		1.0
Diluted average common shares outstanding	199.5		198.8
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	0.25	$	0.12
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	0.25	$	0.12
Anti-dilutive shares excluded from earnings per share calculation	—		—