Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Significant Accounting Policies [Abstract]

Utility plant schedule

Great Plains Energy
December 31	2011		2010
Utility Plant, at original cost	(millions)
Generation (20 - 60 years)	$	6,594.0	$	6,369.4
Transmission (15 - 70 years)		734.8		716.9
Distribution (8 - 66 years)		2,921.1		2,813.4
General (5 - 50 years)		674.9		637.2
Total (a)	$	10,924.8	$	10,536.9
(a) Includes $105.5 million and $103.0 million at December 31,
2011 and 2010, respectively, of land and other assets that
are not depreciated.

KCP&L
December 31	2011		2010
Utility Plant, at original cost	(millions)
Generation (20 - 60 years)	$	5,078.1	$	4,886.2
Transmission (15 - 70 years)		412.9		408.7
Distribution (8 - 55 years)		1,840.2		1,776.4
General (5 - 50 years)		498.1		469.6
Total (a)	$	7,829.3	$	7,540.9
(a) Includes $59.8 million and $59.9 million at December 31,
2011 and 2010, respectively, of land and other assets that
are not depreciated.

Basic and diluted earnings per share

	2011			2010		2009
Income	(millions, except per share amounts)
Income from continuing operations	$	174.2		$	211.9	$	151.9
Less: net income (loss) attributable to noncontrolling interest		(0.2	)		0.2		0.3
Less: preferred stock dividend requirements		1.6			1.6		1.6
Income from continuing operations available for common shareholders	$	172.8		$	210.1	$	150.0
Common Shares Outstanding
Average number of common shares outstanding		135.6			135.1		129.3
Add: effect of dilutive securities		3.1			1.8		0.5
Diluted average number of common shares outstanding		138.7			136.9		129.8
Basic EPS from continuing operations	$	1.27		$	1.55	$	1.16
Diluted EPS from continuing operations	$	1.25		$	1.53	$	1.15