Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Derivative Instruments [Abstract]

Values of open positions for derivative instruments

	December 31					December 31
	2011					2010
	Notional					Notional
	Contract		Fair			Contract		Fair
	Amount		Value			Amount		Value
Great Plains Energy	(millions)
Futures contracts
Cash flow hedges	$	2.0	$	(0.5	)	$	4.0	$	-
Non-hedging derivatives		23.6		(5.0	)		59.5		(2.5	)
Forward contracts
Non-hedging derivatives		97.3		7.8			202.8		8.9
Option contracts
Non-hedging derivatives		0.4		-			0.2		-
Anticipated debt issuance
Forward starting swaps		-		-			350.0		(20.8	)
KCP&L
Futures contracts
Cash flow hedges		2.0		(0.5	)		4.0		-

Fair value of open derivative positions, gross values before netting agreements and netting of cash collatral

Great Plains Energy
	Balance Sheet	Asset Derivatives		Liability Derivatives
December 31, 2011	Classification	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments		(millions)
Commodity contracts	Derivative instruments	$	-	$	0.5
Derivatives Not Designated as Hedging Instruments
Commodity contracts	Derivative instruments		7.8		5.0
Total Derivatives		$	7.8	$	5.5
December 31, 2010
Derivatives Designated as Hedging Instruments
Commodity contracts	Derivative instruments	$	0.1	$	0.1
Interest rate contracts	Derivative instruments		-		20.8
Derivatives Not Designated as Hedging Instruments
Commodity contracts	Derivative instruments		9.4		3.0
Total Derivatives		$	9.5	$	23.9

KCP&L
	Balance Sheet	Asset Derivatives		Liability Derivatives
December 31, 2011	Classification	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments		(millions)
Commodity contracts	Derivative instruments	$	-	$	0.5
December 31, 2010
Derivatives Designated as Hedging Instruments
Commodity contracts	Derivative instruments	$	0.1	$	0.1

Gain (loss) recognized in other comprehensive income or earnings for interest rate and commodity hedges

Great Plains Energy
Derivatives in Cash Flow Hedging Relationship
				Gain (Loss) Reclassified from
				Accumulated OCI into Income
				(Effective Portion)
	Amount of Gain
	(Loss) Recognized
	in OCI on Derivatives			Income Statement
	(Effective Portion)			Classification		Amount
2011	(millions)				(millions)
Interest rate contracts	$	(5.3	)	Interest charges	$	(16.9	)
Commodity contracts		(0.6	)	Fuel		(0.1	)
Income tax benefit		2.3		Income tax benefit		6.6
Total	$	(3.6	)	Total	$	(10.4	)
2010
Interest rate contracts	$	(27.1	)	Interest charges	$	(10.1	)
Commodity contracts		(0.9	)	Fuel		(0.5	)
Income tax benefit		10.8		Income tax benefit		4.0
Total	$	(17.2	)	Total	$	(6.6	)

KCP&L
Derivatives in Cash Flow Hedging Relationship
				Gain (Loss) Reclassified from
				Accumulated OCI into Income
				(Effective Portion)
	Amount of Gain
	(Loss) Recognized
	in OCI on Derivatives			Income Statement
	(Effective Portion)			Classification		Amount
2011	(millions)				(millions)
Interest rate contracts	$	-		Interest charges	$	(8.7	)
Commodity contracts		(0.6	)	Fuel		(0.1	)
Income tax benefit		0.2		Income tax benefit		3.4
Total	$	(0.4	)	Total	$	(5.4	)
2010
Interest rate contracts	$	-		Interest charges	$	(8.8	)
Commodity contracts		(0.9	)	Fuel		(0.5	)
Income tax benefit		0.3		Income tax benefit		3.6
Total	$	(0.6	)	Total	$	(5.7	)

Gain (loss) recognized in a regulatory balance sheet account or earnings for utility commodity hedges

Great Plains Energy
Derivatives in Regulatory Account Relationship
				Gain (Loss) Reclassified from
				Regulatory Account
	Amount of Gain (Loss)
	Recognized on Regulatory
	Account on Derivatives			Income Statement
	(Effective Portion)			Classification	Amount
	(millions)				(millions)
2011
Commodity contracts	$	(8.3	)	Fuel	$	(3.8	)
Total	$	(8.3	)	Total	$	(3.8	)
2010
Commodity contracts	$	(8.2	)	Fuel	$	(7.2	)
Total	$	(8.2	)	Total	$	(7.2	)

Accumulated other comprehensive income related to cash flow hedges

	Great Plains Energy						KCP&L
	December 31						December 31
	2011			2010			2011			2010
	(millions)
Current assets	$	11.3		$	12.0		$	11.3		$	12.0
Current liabilities		(89.5	)		(101.5	)		(62.5	)		(71.6	)
Noncurrent liabilities		(0.2	)		-			(0.2	)		-
Deferred income taxes		30.5			34.8			20.0			23.2
Total	$	(47.9	)	$	(54.7	)	$	(31.4	)	$	(36.4	)