Quarterly Operating Results (Unaudited)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

25. QUARTERLY OPERATING RESULTS (UNAUDITED)

	Quarter
Great Plains Energy	1st			2nd		3rd		4th
2013	(millions, except per share amounts)
Operating revenue	$	542.2		$	600.3	$	765.0	$	538.8
Operating income	86.1			143.6		271.7		67.8
Net income	26.0			63.6		143.1		17.5
Basic and diluted earnings per common share	0.17			0.41		0.93		0.11
2012
Operating revenue	$	479.7		$	603.6	$	746.2	$	480.4
Operating income	49.0			150.0		277.0		62.9
Net income (loss)	(9.3		)	58.1		146.4		4.7
Net income (loss) attributable to Great Plains Energy	(9.1		)	58.1		146.2		4.7
Basic and diluted earnings (loss) per common share	(0.07		)	0.41		0.95		0.03

	Quarter
KCP&L	1st		2nd		3rd		4th
2013	(millions)
Operating revenue	$	366.7	$	410.8	$	522.0	$	371.9
Operating income	52.3		93.4		176.8		40.0
Net income	16.2		44.2		96.4		12.2
2012
Operating revenue	$	327.0	$	409.1	$	508.0	$	335.8
Operating income	31.6		99.9		177.8		39.4
Net income	2.3		43.7		90.2		5.4

Quarterly data is subject to seasonal fluctuations with peak periods occurring in the summer months.