Common Equity (Tables)

12 Months Ended

Dec. 31, 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:

(In millions)	2013		2012		2011
Net Income Attributable to OGE Energy	$	387.6	$	355.0	$	342.9
Average Common Shares Outstanding
Basic average common shares outstanding	198.2		197.1		195.8
Effect of dilutive securities:
Contingently issuable shares (performance units)	1.2		1.0		2.7
Diluted average common shares outstanding	199.4		198.1		198.5
Basic Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	1.96	$	1.80	$	1.75
Diluted Earnings Per Average Common Share Attributable to OGE Energy Common Shareholders	$	1.94	$	1.79	$	1.73