Common Equity (Tables)

9 Months Ended

Sep. 30, 2013

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				Nine Months Ended
	September 30,				September 30,
(In millions)	2013		2012		2013		2012
Net Income Attributable to OGE Energy	$	215.2	$	185.5	$	330.0	$	316.5
Average Common Shares Outstanding
Basic average common shares outstanding	198.4		197.4		198.1		197.0
Effect of dilutive securities:
Contingently issuable shares (performance units)	1.3		0.9		1.2		0.9
Diluted average common shares outstanding	199.7		198.3		199.3		197.9
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	1.08	$	0.94	$	1.67	$	1.61
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	1.08	$	0.94	$	1.66	$	1.60
Anti-dilutive shares excluded from earnings per share calculation	—		—		—		—