Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Great Plains Energy Other Operating Activities
Year Ended December 31	2015			2014			2013
Cash flows affected by changes in:	(millions)
Receivables	$	12.5		$	3.0		$	(7.1	)
Accounts receivable pledged as collateral	(4.0		)	4.0			(1.0		)
Fuel inventories	(28.3		)	(13.7		)	18.7
Materials and supplies	(3.0		)	(0.4		)	(1.0		)
Accounts payable	(11.4		)	15.2			26.4
Accrued taxes	1.1			8.3			2.2
Accrued interest	3.4			(4.1		)	3.9
Deferred refueling outage costs	(6.7		)	17.0			(17.6		)
Pension and post-retirement benefit obligations	18.5			25.5			31.3
Allowance for equity funds used during construction	(4.8		)	(18.0		)	(14.1		)
Fuel recovery mechanism	47.5			(28.5		)	(1.3		)
Solar rebates paid	(9.0		)	(43.2		)	(32.5		)
Other	(2.9		)	(12.3		)	16.2
Total other operating activities	$	12.9		$	(47.2	)	$	24.1
Cash paid during the period:
Interest	$	182.2		$	174.8		$	170.8
Income taxes	$	0.1		$	—		$	—
Non-cash investing activities:
Liabilities accrued for capital expenditures	$	35.7		$	57.4		$	48.1

KCP&L Other Operating Activities
Year Ended December 31	2015			2014			2013
Cash flows affected by changes in:	(millions)
Receivables	$	2.6		$	(18.1	)	$	(12.6	)
Fuel inventories	(24.7		)	(8.5		)	13.3
Materials and supplies	(4.5		)	(1.1		)	1.1
Accounts payable	(18.0		)	20.4			7.3
Accrued taxes	(19.0		)	(42.5		)	(3.7		)
Accrued interest	3.4			(0.1		)	1.4
Deferred refueling outage costs	(6.7		)	17.0			(17.6		)
Pension and post-retirement benefit obligations	18.4			26.9			35.7
Allowance for equity funds used during construction	(3.8		)	(16.0		)	(14.1		)
Fuel recovery mechanism	3.5			(2.2		)	(1.8		)
Solar rebates paid	(7.2		)	(17.3		)	(8.2		)
Other	(5.5		)	(23.2		)	(10.0		)
Total other operating activities	$	(61.5	)	$	(64.7	)	$	(9.2	)
Cash paid during the period:
Interest	$	120.2		$	112.1		$	111.7
Income taxes	$	—		$	30.2		$	4.6
Non-cash investing activities:
Liabilities accrued for capital expenditures	$	23.9		$	48.8		$	40.5