Income Tax Expense (Tables)

9 Months Ended

Sep. 30, 2015

Income Tax Expense [Abstract]

Income Tax Expense [Table Text Block]

	Quarter Ended					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015			2014
Millions
Current Tax Expense
Federal (a)	—		—			—			—
State (a) (b)	$0.2		$1.8				$0.5		$1.9
Total Current Tax Expense	$0.2		$1.8				$0.5		$1.9
Deferred Tax Expense (Benefit)
Federal	$14.8			$11.2		$23.5				$20.4
State	(0.4	)	0.7			3.6			5.4
Investment Tax Credit Amortization	(0.2	)	(0.3		)	(0.6		)	(0.6		)
Total Deferred Tax Expense	14.2		11.6			26.5			25.2
Total Income Tax Expense	$14.4			$13.4		$27.0				$27.1

(a) For the quarter and nine months ended September 30, 2015, 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.

(b) For the quarter and nine months ended September 30, 2014, the state current tax expense reflected initiatives implemented on the 2013 federal and state tax returns to utilize tax carryforwards that may have expired due to NOL carryforwards from prior periods. State NOL and alternative minimum tax carryforwards remaining after utilization in 2015 will be carried forward to offset future income.

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
Nine Months Ended September 30	2015			2014
Millions
Income Before Non-Controlling Interest and Income Taxes		$149.7			$119.4
Statutory Federal Income Tax Rate	35		%	35		%
Income Taxes Computed at 35 percent Statutory Federal Rate	52.4			41.8
Increase (Decrease) in Tax Due to:
State Income Taxes – Net of Federal Income Tax Benefit	2.6			4.8
Production Tax Credits	(27.0		)	(16.4		)
Regulatory Differences for Utility Plant	(0.7		)	(2.1		)
Other	(0.3		)	(1.0		)
Total Income Tax Expense		$27.0			$27.1