Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Operating Revenues
Electric revenues	$ 773.7	$ 728.8	$ 1,831.7	$ 1,787.7
Operating Expenses
Fuel	146.5	127.3	365.8	333.2
Purchased power	68.1	68.0	178.4	171.4
Transmission of electricity by others	8.6	8.1	23.1	20.9
Utility operating and maintenance expenses	169.1	147.7	487.7	447.3
Voluntary separation program	0	0	12.7	0
Depreciation and amortization	65.9	85.3	205.9	248.5
General taxes	52.3	43.6	134.6	119.2
Other	0.5	5.0	4.0	6.5
Total	511.0	485.0	1,412.2	1,347.0
Operating income	262.7	243.8	419.5	440.7
Non-operating income	1.4	7.5	5.8	34.8
Non-operating expenses	(1.3)	(3.4)	(6.3)	(7.1)
Interest charges	(60.8)	(45.5)	(156.0)	(138.7)
Income before income tax expense and loss from equity investments	202.0	202.4	263.0	329.7
Income tax expense	(75.4)	(70.4)	(90.6)	(112.1)
Loss from equity investments, net of income taxes	0	0	(0.1)	(0.9)
Income from continuing operations	126.6	132.0	172.3	216.7
Net income	126.6	132.0	172.3	216.7
Less: Net income attributable to noncontrolling interest	(0.1)	0	0	(0.1)
Net income attributable to Great Plains Energy	126.5	132.0	172.3	216.6
Preferred stock dividend requirements	0.4	0.4	1.2	1.2
Earnings available for common shareholders	126.1	131.6	171.1	215.4
Average number of basic common shares outstanding	135.7	135.2	135.6	135.1
Average number of diluted common shares outstanding	138.3	136.9	138.5	136.8
Basic earnings (loss) per common share
Continuing operations	$ 0.93	$ 0.97	$ 1.26	$ 1.59
Basic earnings per common share	$ 0.93	$ 0.97	$ 1.26	$ 1.59
Diluted earnings (loss) per common share
Continuing operations	$ 0.91	$ 0.96	$ 1.24	$ 1.57
Diluted earnings per common share	$ 0.91	$ 0.96	$ 1.24	$ 1.57
Cash dividends per common share	$ 0.2075	$ 0.2075	$ 0.6225	$ 0.6225
KANSAS CITY POWER AND LIGHT CO [Member]
Operating Revenues
Electric revenues	506.3	486.5	1,220.5	1,194.7
Operating Expenses
Fuel	99.3	83.8	249.0	213.2
Purchased power	24.9	25.0	66.7	63.2
Transmission of electricity by others	5.7	4.4	14.2	11.3
Utility operating and maintenance expenses	120.2	102.9	350.7	323.5
Voluntary separation program	0	0	9.2	0
Depreciation and amortization	45.4	66.4	147.0	192.2
General taxes	41.6	37.2	108.9	99.3
Other	0	3.2	1.3	3.2
Total	337.1	322.9	947.0	905.9
Operating income	169.2	163.6	273.5	288.8
Non-operating income	0.8	6.1	1.8	23.3
Non-operating expenses	(1.0)	(2.5)	(3.4)	(4.7)
Interest charges	(30.8)	(20.1)	(81.2)	(63.8)
Income before income tax expense and loss from equity investments	138.2	147.1	190.7	243.6
Income tax expense	(52.8)	(54.5)	(67.9)	(83.6)
Net income	$ 85.4	$ 92.6	$ 122.8	$ 160.0