Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 12.0	$ 11.3
Funds on deposit	2.4	2.1
Receivables, net	194.1	147.7
Accounts receivable pledged as collateral	190.0	175.0
Fuel inventories, at average cost	98.6	118.4
Materials and supplies, at average cost	161.0	155.7
Deferred refueling outage costs	11.7	19.2
Refundable income taxes	1.1	3.8
Prepaid expenses and other assets	67.9	31.0
Total	738.8	664.2
Utility Plant, at Original Cost
Electric	13,418.7	13,189.9
Less - accumulated depreciation	5,041.6	4,943.7
Net utility plant in service	8,377.1	8,246.2
Construction work in progress	400.9	347.9
Nuclear fuel, net of amortization of $214.9 and $192.5	66.5	68.3
Total	8,844.5	8,662.4
Investments and Other Assets
Nuclear decommissioning trust fund	218.3	200.7
Regulatory assets	980.4	979.1
Goodwill	169.0	169.0
Other	93.7	63.2
Total	1,461.4	1,412.0
Total	11,044.7	10,738.6
Current Liabilities
Notes payable	104.0	10.0
Collateralized note payable	190.0	175.0
Commercial paper	157.1	224.0
Current maturities of long-term debt	382.1	1.1
Accounts payable	227.7	352.9
Accrued taxes	123.4	31.6
Accrued interest	61.4	44.7
Accrued compensation and benefits	47.5	41.4
Pension and post-retirement liability	3.4	3.4
Derivative instruments	78.8	0.5
Other	24.7	31.1
Total	1,400.1	915.7
Deferred Credits and Other Liabilities
Deferred income taxes	1,270.5	1,158.8
Deferred tax credits	126.5	125.1
Asset retirement obligations	285.0	275.9
Pension and post-retirement liability	467.2	455.2
Regulatory liabilities	305.1	284.4
Other	82.6	82.9
Total	2,536.9	2,382.3
Common shareholders' equity
Common stock	2,661.7	2,646.7
Retained earnings	1,092.7	1,024.4
Treasury stock - 128,096 and 101,229 shares, at cost	(3.8)	(2.6)
Accumulated other comprehensive loss	(7.5)	(12.0)
Total	3,743.1	3,656.5
Cumulative preferred stock $100 par value
Preferred Stock, Value, Issued	0.0	39.0
Long-term debt (Note 11)	3,364.6	3,745.1
Total	7,107.7	7,440.6
Commitments and Contingencies (Note 14)
Total	11,044.7	10,738.6
Preferred Stock 3 Point 80 [Member]
Cumulative preferred stock $100 par value
Preferred Stock, Value, Issued	0.0	10.0
Preferred Stock 4 Point 50 [Member]
Cumulative preferred stock $100 par value
Preferred Stock, Value, Issued	0.0	10.0
Preferred Stock 4 Point 20 [Member]
Cumulative preferred stock $100 par value
Preferred Stock, Value, Issued	0.0	7.0
Preferred Stock 4 Point 35 [Member]
Cumulative preferred stock $100 par value
Preferred Stock, Value, Issued	0.0	12.0
Kansas City Power and Light Company [Member]
Current Assets
Cash and cash equivalents	5.7	2.3
Funds on deposit	1.4	0.5
Receivables, net	168.7	129.2
Related party receivables	91.0	65.8
Accounts receivable pledged as collateral	110.0	110.0
Fuel inventories, at average cost	70.8	83.5
Materials and supplies, at average cost	118.4	114.6
Deferred refueling outage costs	11.7	19.2
Refundable income taxes	0.0	79.0
Prepaid expenses and other assets	27.1	27.1
Total	604.8	631.2
Utility Plant, at Original Cost
Electric	9,768.8	9,640.4
Less - accumulated depreciation	3,806.1	3,722.6
Net utility plant in service	5,962.7	5,917.8
Construction work in progress	306.5	246.6
Nuclear fuel, net of amortization of $214.9 and $192.5	66.5	68.3
Total	6,335.7	6,232.7
Investments and Other Assets
Nuclear decommissioning trust fund	218.3	200.7
Regulatory assets	733.6	732.4
Other	20.7	17.6
Total	972.6	950.7
Total	7,913.1	7,814.6
Current Liabilities
Collateralized note payable	110.0	110.0
Commercial paper	0.0	180.3
Current maturities of long-term debt	281.0	0.0
Accounts payable	180.3	258.8
Accrued taxes	125.7	25.6
Accrued interest	41.3	32.4
Accrued compensation and benefits	47.5	41.4
Pension and post-retirement liability	2.0	2.0
Other	11.5	12.6
Total	799.3	663.1
Deferred Credits and Other Liabilities
Deferred income taxes	1,209.3	1,132.6
Deferred tax credits	123.0	123.8
Asset retirement obligations	246.7	239.3
Pension and post-retirement liability	445.7	433.4
Regulatory liabilities	176.5	164.6
Other	60.8	61.6
Total	2,262.0	2,155.3
Common shareholders' equity
Common stock	1,563.1	1,563.1
Retained earnings	1,010.8	879.6
Accumulated other comprehensive loss	(5.6)	(9.6)
Total	2,568.3	2,433.1
Cumulative preferred stock $100 par value
Long-term debt (Note 11)	2,283.5	2,563.1
Total	4,851.8	4,996.2
Commitments and Contingencies (Note 14)
Total	$ 7,913.1	$ 7,814.6