Equity Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Equity Compensation [Abstract]

Equity compensation expense and associated income tax benefits

	Three Months Ended				Year to Date
	June 30				June 30
	2012		2011		2012		2011
Great Plains Energy	(millions)
Compensation expense	$	1.8	$	1.7	$	2.8	$	3.3
Income tax benefit		0.7		0.8		1.3		1.4
KCP&L
Compensation expense	$	1.4	$	1.2	$	2.1	$	2.3
Income tax benefit		0.5		0.6		1.0		1.0

Performance share activity

	Performance			Grant Date
	Shares			Fair Value*
Beginning balance		442,042		$	21.06
Granted		161,627			19.01
Forfeited		(50,685	)		18.71
Performance adjustment		(160,717	)
Ending balance		392,267			22.98
* weighted-average

Restricted stock activity

	Nonvested			Grant Date
	Restricted Stock			Fair Value*
Beginning balance		386,183		$	17.06
Granted and issued		162,129			19.69
Vested		(204,838	)		15.76
Forfeited		(50,685	)		19.66
Ending balance		292,789			18.97
* weighted-average