Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities
Net income (loss)	$ (6.1)	$ 192.0
Adjustments to reconcile income (loss) to net cash from operating activities:
Depreciation and amortization	277.7	256.9
Amortization of:
Nuclear fuel	24.1	22.4
Other	55.2	52.4
Deferred income taxes, net	89.7	109.9
Investment tax credit amortization	(1.1)	(1.1)
Income from equity investments, net of income taxes	(2.0)	(2.1)
Fair value impacts of interest rate swaps	1.9	78.8
Loss on Series B Preferred Stock dividend make-whole provisions (Note 12)	124.8	0.0
Loss on extinguishment of debt (Note 11)	82.8	0.0
Other operating activities (Note 3)	2.7	(24.4)
Net cash from operating activities	649.7	684.8
Cash Flows from Investing Activities
Utility capital expenditures	(392.5)	(435.3)
Allowance for borrowed funds used during construction	(5.1)	(4.7)
Purchases of nuclear decommissioning trust investments	(23.8)	(23.7)
Proceeds from nuclear decommissioning trust investments	21.3	21.2
Proceeds from time deposit	1,000.0	0.0
Other investing activities	(30.7)	(48.7)
Net cash from investing activities	569.2	(491.2)
Cash Flows from Financing Activities
Issuance of common stock	2.9	2.4
Issuance of long-term debt	4,591.1	0.0
Issuance fees	(38.3)	(68.7)
Repayment of long-term debt, including redemption premium	(4,725.1)	(1.1)
Net change in short-term borrowings	(86.9)	27.1
Net change in collateralized short-term borrowings	22.6	15.0
Dividends paid	(212.7)	(122.5)
Redemption of preferred stock	(963.4)	(40.1)
Purchase of treasury stock	(4.1)	(4.9)
Other financing activities	(0.2)	(0.1)
Net cash from financing activities	(1,414.1)	(192.9)
Net Change in Cash and Cash Equivalents	(195.2)	0.7
Cash and Cash Equivalents at Beginning of Year	1,293.1	11.3
Cash and Cash Equivalents at End of Period	1,097.9	12.0
Kansas City Power and Light Company [Member]
Cash Flows from Operating Activities
Net income (loss)	177.9	208.2
Adjustments to reconcile income (loss) to net cash from operating activities:
Depreciation and amortization	199.9	184.1
Amortization of:
Nuclear fuel	24.1	22.4
Other	23.4	25.6
Deferred income taxes, net	33.4	74.0
Investment tax credit amortization	(0.8)	(0.8)
Other operating activities (Note 3)	68.7	74.7
Net cash from operating activities	526.6	588.2
Cash Flows from Investing Activities
Utility capital expenditures	(295.1)	(286.1)
Allowance for borrowed funds used during construction	(4.2)	(3.8)
Purchases of nuclear decommissioning trust investments	(23.8)	(23.7)
Proceeds from nuclear decommissioning trust investments	21.3	21.2
Net money pool lending	0.0	(11.1)
Other investing activities	(17.0)	(23.8)
Net cash from investing activities	(318.8)	(327.3)
Cash Flows from Financing Activities
Issuance of long-term debt	299.2	0.0
Issuance fees	(3.0)	(0.2)
Repayment of long-term debt, including redemption premium	(281.0)	0.0
Net change in short-term borrowings	(60.9)	(180.3)
Net change in collateralized short-term borrowings	20.0	0.0
Dividends paid	(182.0)	(77.0)
Net cash from financing activities	(207.7)	(257.5)
Net Change in Cash and Cash Equivalents	0.1	3.4
Cash and Cash Equivalents at Beginning of Year	4.5	2.3
Cash and Cash Equivalents at End of Period	$ 4.6	$ 5.7