Common Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

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

The following table presents the calculation of basic and diluted earnings per share for OGE Energy.

	Three Months Ended March 31,
(In millions except per share data)	2022		2021
Net income	$	279.5	$	52.7
Average common shares outstanding:
Basic average common shares outstanding	200.2		200.1
Effect of dilutive securities:
Contingently issuable shares (performance and restricted stock units)	0.4		—
Diluted average common shares outstanding	200.6		200.1
Basic earnings per average common share	$	1.40	$	0.26
Diluted earnings per average common share	$	1.39	$	0.26
Anti-dilutive shares excluded from earnings per share calculation	—		—