Income Tax Expense (Tables)

6 Months Ended

Jun. 30, 2015

Income Tax Expense [Abstract]

Income Tax Expense [Table Text Block]

	Quarter Ended					Six Months Ended
	June 30,					June 30,
	2015		2014			2015			2014
Millions
Current Tax Expense
Federal (a)	—		—			—			—
State (a)	$0.2		$0.1				$0.3		$0.1
Total Current Tax Expense	$0.2		$0.1				$0.3		$0.1
Deferred Tax Expense
Federal	$3.9			$2.9		$8.7				$9.2
State	2.5		2.0			4.0			4.7
Investment Tax Credit Amortization	(0.2	)	(0.1		)	(0.4		)	(0.3		)
Total Deferred Tax Expense	6.2		4.8			12.3			13.6
Total Income Tax Expense	$6.4			$4.9		$12.6				$13.7

(a) For the six months ended June 30, 2015 and 2014, the federal and state current tax expense was minimal due to the utilization of NOL carryforwards from prior periods. The NOL carryforwards resulted from the bonus depreciation provisions of the Tax Increase Prevention Act of 2014 and the American Taxpayer Relief Act of 2012.

Reconciliation of Taxes from Federal Statutory Rate to Total Income Tax Expense [Table Text Block]

Reconciliation of Taxes from Federal Statutory
Rate to Total Income Tax Expense
Six Months Ended June 30	2015			2014
Millions
Income Before Non-Controlling Interest and Income Taxes		$75.0			$64.4
Statutory Federal Income Tax Rate	35		%	35		%
Income Taxes Computed at 35 percent Statutory Federal Rate		$26.3			$22.5
Increase (Decrease) in Tax Due to:
State Income Taxes – Net of Federal Income Tax Benefit	2.8			3.1
Production Tax Credits	(19.2		)	(12.8		)
Regulatory Differences for Utility Plant	(0.4		)	(1.6		)
Other	3.1			2.5
Total Income Tax Expense		$12.6			$13.7