Operations by Line of Business (Notes)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Operations by Line of Business

Operations by Line of Business

Questar's three principal complementary lines of business include Questar Gas, which provides retail natural gas distribution in Utah, Wyoming and Idaho; Wexpro, which develops and produces natural gas from cost-of-service reserves for Questar Gas customers; and Questar Pipeline, which operates interstate natural gas pipelines and storage facilities and provides other energy services. Line-of-business information is presented according to senior management's basis for evaluating performance and considering differences in the nature of products, services and regulation, among other factors.

Following is a summary of operations by line of business:

	3 Months Ended						9 Months Ended						12 Months Ended
	September 30,						September 30,						September 30,
	2015			2014			2015			2014			2015			2014
	(in millions)
Revenues from Unaffiliated Customers
Questar Gas	$	89.3		$	100.7		$	605.8		$	642.0		$	924.7		$	979.4
Wexpro	6.4			9.4			22.8			29.5			28.9			42.6
Questar Pipeline	45.0			47.3			138.3			143.4			185.1			190.6
Other	1.6			0.5			3.3			1.2			4.7			1.4
Total	$	142.3		$	157.9		$	770.2		$	816.1		$	1,143.4		$	1,214.0
Revenues from Affiliated Companies
Wexpro	$	80.7		$	82.3		$	241.1		$	266.3		$	325.1		$	345.9
Questar Pipeline	17.6			17.7			54.8			54.7			73.8			76.6
Total	$	98.3		$	100.0		$	295.9		$	321.0		$	398.9		$	422.5
Operating Income (Loss)
Questar Gas	$	(8.9	)	$	(9.4	)	$	69.1		$	60.7		$	117.9		$	107.3
Wexpro	40.7			47.2			124.2			141.5			166.0			187.3
Questar Pipeline	28.8			28.8			85.5			89.3			113.8			119.1
Corporate and other	1.7			2.3			5.8			2.2			(1.4		)	2.6
Total	$	62.3		$	68.9		$	284.6		$	293.7		$	396.3		$	416.3
Net Income (Loss)
Questar Gas	$	(8.8	)	$	(9.1	)	$	32.2		$	27.2		$	60.2		$	53.2
Wexpro	26.9			31.1			82.5			93.0			112.3			121.4
Questar Pipeline	15.2			14.9			44.3			46.3			58.6			62.1
Corporate and other	(0.7		)	1.7			(1.2		)	(2.5		)	(10.8		)	(4.6		)
Total	$	32.6		$	38.6		$	157.8		$	164.0		$	220.3		$	232.1