Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

The components of income tax expense were as follows:



	Year Ended December 31,
	2013			2012			2011
	(in millions)
Federal
Current	$	66.5		$	1.3		$	—
Deferred	18.4			112.0			110.8
State
Current	10.7			—			(1.3		)
Deferred	5.9			3.6			7.3
Deferred investment tax credits recognized	(0.2		)	(0.4		)	(0.4		)
Total income tax expense	$	101.3		$	116.5		$	116.4

The difference between the statutory federal income tax rate and the Company's effective income tax rate is explained as follows:



	Year Ended December 31,
	2013		2012		2011
Federal income taxes statutory rate	35.0	%	35.0	%	35.0	%
Increase (decrease) in rate as a result of:
State income taxes, net of federal income tax benefit	4.0		1.0		1.3
Tax benefits from dividends paid to employee stock plan	(1.0	)	(0.5	)	(0.5	)
Other	0.6		—		0.1
Effective income tax rate	38.6	%	35.5	%	35.9	%

Significant components of Questar's deferred income taxes were as follows:



	December 31,
	2013			2012
	(in millions)
Deferred income taxes - noncurrent
Deferred tax liabilities
Property, plant and equipment	$	797.5		$	767.0
Employee benefits	30.2			33.9
Other	4.9			3.2
Deferred tax liabilities - noncurrent	832.6			804.1
Deferred tax assets
Asset retirement obligations	22.7			23.2
Pension and other postretirement benefits	73.7			138.3
Deferred compensation	14.5			8.6
Hedging activities	13.4			13.6
State tax credits	3.4			3.4
Net operating loss carryforward	—			15.8
Valuation allowance	(2.3		)	(2.2		)
Deferred tax assets, net of allowance - noncurrent	125.4			200.7
Net deferred income tax liability - noncurrent	$	707.2		$	603.4

Deferred income taxes - current
Deferred tax assets - current	$	10.1		$	17.6
Deferred tax liabilities - current	0.4			4.6
Net deferred income tax asset - current	$	9.7		$	13.0

Questar Gas [Member]

The components of income tax expense were as follows:



	Year Ended December 31,
	2013			2012			2011
	(in millions)
Federal
Current	$	6.0		$	(18.7	)	$	—
Deferred	23.5			45.1			26.3
State
Current	0.6			—			(1.6		)
Deferred	2.0			1.2			3.2
Deferred investment tax credit recognized	(0.2		)	(0.4		)	(0.4		)
Total income tax expense	$	31.9		$	27.2		$	27.5

The difference between the statutory federal income tax rate and Questar Gas's effective income tax rate is explained as follows:



	Year Ended December 31,
	2013		2012		2011
Federal income taxes statutory rate	35.0	%	35.0	%	35.0	%
Increase (decrease) in rate as a result of:
State income taxes, net of federal income tax benefit	2.1		1.0		1.4
Amortization of investment tax credits related to rate-regulated assets	(0.3	)	(0.4	)	(0.5	)
Other	0.9		1.0		1.5
Effective income tax rate	37.7	%	36.6	%	37.4	%

Significant components of Questar Gas's deferred income taxes were as follows:



	December 31,
	2013		2012
	(in millions)
Deferred income taxes - noncurrent
Deferred tax liabilities
Property, plant and equipment	$	322.6	$	293.0
Employee benefits	14.0		17.2
Other	4.9		3.4
Deferred tax liabilities - noncurrent	341.5		313.6
Deferred tax assets
Deferred compensation	0.8		0.9
Net operating loss carryforward	—		11.1
Deferred tax assets - noncurrent	0.8		12.0
Net deferred income tax liability - noncurrent	$	340.7	$	301.6

Deferred income taxes - current
Deferred tax assets - current	$	3.3	$	6.1
Deferred tax liabilities - current	0.4		4.6
Net deferred income tax asset - current	$	2.9	$	1.5

Questar Pipeline [Member]

The components of income tax expense were as follows:

The difference between the statutory federal income tax rate and Questar Pipeline's effective income tax rate is explained as follows:



	Year Ended December 31,
	2013		2012		2011
Federal income taxes statutory rate	35.0	%	35.0	%	35.0	%
Increase in rate as a result of:
State income taxes, net of federal income tax benefit	8.5		1.6		1.0
Other	2.6		—		—
Effective income tax rate	46.1	%	36.6	%	36.0	%

Significant components of Questar Pipeline's deferred income taxes were as follows:



	December 31,
	2013		2012
	(in millions)
Deferred income taxes - noncurrent
Deferred tax liabilities
Property, plant and equipment	$	237.1	$	250.8
Employee benefits	7.4		8.4
Deferred tax liabilities - noncurrent	244.5		259.2
Deferred tax assets
Deferred compensation	1.8		1.5
Hedging activities	13.4		13.6
State tax credits	0.7		0.7
Net operating loss carryforward	—		1.0
Other	—		(0.1		)
Deferred tax assets - noncurrent	15.9		16.7
Net deferred income tax liability - noncurrent	$	228.6	$	242.5

Net deferred income tax asset - current	$	1.8	$	1.6