Income Tax Expense (Tables)

3 Months Ended

Mar. 31, 2015

Income Tax Expense [Abstract]

Income Tax Expense [Table Text Block]

	Three Months Ended
	March 31,
	2015			2014
Millions
Current Tax Expense
Federal (a)	—			—
State (a)	$0.1			—
Total Current Tax Expense	$0.1			—
Deferred Tax Expense
Federal		$4.8			$6.3
State	1.5			2.7
Investment Tax Credit Amortization	(0.2		)	(0.2		)
Total Deferred Tax Expense	6.1			8.8
Total Income Tax Expense		$6.2			$8.8

(a) For the three months ended March 31, 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.