Supplementary Financial Information for Oil and Gas Producing Activities (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Supplementary Financial Information for Oil and Gas Producing Activities (Unaudited)

Schedule of results of operations from oil and gas producing activities

	2014		2013		2012
Results of Operations
Revenues	$	5,274	$	5,762	$	7,121
Production and operating costs		1,546		1,920		1,891
Depreciation and depletion		895		955		1,291
Results of operations before income taxes		2,833		2,887		3,939
Income tax expense		742		736		1,044
Results of operations (excluding corporate overhead and interest costs)	$	2,091	$	2,151	$	2,895
Costs Incurred
Development costs incurred	$	25	$	58	$	81
Exploration costs		—		—		—
Capitalized asset retirement costs		—		—		—
Property acquisition costs		—		—		—
Capitalized Costs
Natural gas properties—proved	$	18,384	$	18,359	$	18,301
Less: accumulated depreciation and depletion		9,153		8,256		7,294
Net capitalized costs for natural gas properties	$	9,231	$	10,103	$	11,007

Summary of changes in proved reserves

	Natural Gas (BCF) 2014			Natural Gas Liquids (MMBBLS) 2014			Natural Gas (BCF) 2013			Natural Gas Liquids (MMBBLS) 2013			Natural Gas (BCF) 2012			Natural Gas Liquids (MMBBLS) 2012
Proved reserves—beginning of year		7.6			1.1			8.3			1.1			10.3			1.5
Revisions of previous estimates		(0.3	)		—			—			0.1			(0.8	)		(0.3	)
Extensions and discoveries		—			—			—			—			—			—
Production		(0.6	)		(0.1	)		(0.7	)		(0.1	)		(1.2	)		(0.1	)
Proved reserves—end of year		6.7			1.0			7.6			1.1			8.3			1.1
Proved developed reserves—end of year		6.7			1.0			7.6			1.1			8.3			1.1

Schedule of standardized measure of discounted future net cash flows

	2014			2013			2012
Future estimated gross revenues	$	60,073		$	61,873		$	57,882
Future estimated production and development costs		(23,243	)		(24,276	)		(23,905	)
Future estimated net revenues		36,830			37,597			33,977
Future estimated income tax expense		(10,105	)		(10,286	)		(9,193	)
Future estimated net cash flows		26,725			27,311			24,784
10% annual discount for estimated timing of cash flows		(13,437	)		(13,733	)		(12,020	)
Standardized measure of discounted future estimated net cash flows	$	13,288		$	13,578		$	12,764

Schedule of changes in standardized measure of discounted future net cash flows

	2014			2013			2012
Standardized measure—beginning of year	$	13,578		$	12,764		$	29,948
Net change in sales prices and production costs		2,180			4,227			(7,067	)
Sales of natural gas produced, net of production costs		(3,730	)		(3,842	)		(5,230	)
Net change due to changes in quantity estimates		(586	)		430			(5,863	)
Previously estimated development costs incurred		21			56			116
Net change in income taxes		90			(380	)		7,419
Accretion of discount		1,594			1,486			1,603
Timing of production of reserves and other		141			(1,163	)		(8,162	)
Standardized measure—end of year	$	13,288		$	13,578		$	12,764