Document And Entity Information (USD $)	12 Months Ended
Document And Entity Information (USD $)	Dec. 31, 2014	Feb. 13, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	Pioneer Natural Resources Company
Trading Symbol	PXD
Entity Central Index Key	0001038357
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		148,963,753
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 32,612,539,563

Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,025	$ 393
Accounts receivable:
Trade, net	436	431
Due from affiliates	4	3
Income taxes receivable	23	5
Inventories	241	220
Prepaid expenses	15	16
Assets held for sale	0	584
Other current assets:
Derivatives	578	76
Other	37	2
Total current assets	2,359	1,730
Oil and gas properties, using the successful efforts method of accounting:
Proved properties	15,662	13,406
Unproved properties	159	123
Accumulated depletion, depreciation and amortization	(5,431)	(4,903)
Total property, plant and equipment	10,390	8,626
Goodwill	272	274
Other property and equipment, net	1,391	1,224
Other assets:
Investment in unconsolidated affiliate	239	225
Derivatives	181	91
Other, net	94	124
Assets, Total	14,926	12,294
Accounts payable:
Trade	1,197	910
Due to affiliates	123	150
Interest payable	40	62
Income taxes payable	1	0
Deferred income taxes	161	19
Liabilities held for sale	0	39
Other current liabilities:
Derivatives	3	12
Other	55	58
Total current liabilities	1,580	1,250
Long-term debt	2,665	2,653
Derivatives	2	10
Deferred income taxes	1,803	1,473
Other liabilities	287	293
Stockholders' equity:
Common stock, $.01 par value	2	1
Additional paid-in capital	6,167	5,080
Treasury stock, at cost	(171)	(144)
Retained earnings	2,583	1,665
Total stockholders' equity attributable to common stockholders	8,581	6,602
Noncontrolling interest in consolidating subsidiaries	8	13
Total stockholders' equity	8,589	6,615
Liabilities and Stockholders' Equity, Total	$ 14,926	$ 12,294

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	152,000,000	146,000,000
Treasury stock, shares	3,000,000	3,000,000

Consolidated Statements Of Operations (USD $)
In Millions, except Per Share data, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Revenues and other income:

Oil and gas

$ 3,599

$ 3,088

$ 2,512

Sales of purchased oil and gas

726

334

122

Interest and other

(1)

Derivative gains, net

712

330

Gain on disposition of assets, net

209

Revenues

5,055

3,652

3,009

Costs and expenses:

Oil and gas production

693

588

532

Production and ad valorem taxes

220

192

169

Depletion, depreciation and amortization

1,047

889

689

Purchased oil and gas

703

336

120

Impairment of oil and gas properties

1,495

Exploration and abandonments

177

General and administrative

333

296

244

Accretion of discount on asset retirement obligations

Interest

184

204

Other

137

114

Costs and expenses, Total

3,458

4,226

2,177

Income (loss) from continuing operations before income taxes

1,597

(574)

832

Income tax benefit (provision)

(556)

213

(288)

Income (loss) from continuing operations

1,041

(361)

544

Loss from discontinued operations, net of tax

(111)

(438)

(301)

Net income (loss)

930

(799)

243

Net income attributable to noncontrolling interests

(39)

(51)

Net income (loss) attributable to common stockholders

930

(838)

192

Basic earnings per share:

Income (loss) from continuing operations attributable to common stockholders

$ 7.17

$ (2.94)

$ 3.99

Loss from discontinued operations attributable to common stockholders

$ (0.77)

$ (3.22)

$ (2.45)

Net income (loss) attributable to common stockholders

$ 6.40

$ (6.16)

$ 1.54

Diluted earnings per share:

Income (loss) from continuing operations attributable to common stockholders

$ 7.15

$ (2.94)

$ 3.88

Loss from discontinued operations attributable to common stockholders

$ (0.77)

$ (3.22)

$ (2.38)

Net income (loss) attributable to common stockholders

$ 6.38

$ (6.16)

$ 1.50

Weighted average shares outstanding:

Basic

144

136

^[1]

123

Diluted

144

136

^[1]

126

Amounts attributable to common stockholders:

Income (loss) from continuing operations, net of tax

1,041

(400)

493

Income (loss) from discontinued operations, net of tax

(111)

(438)

(301)

Net income (loss)

$ 930

$ (838)

$ 192

[1]

(a)The following common share equivalents were excluded from the weighted average diluted shares for the year ended December 31, 2021 because they would have been anti-dilutive to the loss recorded for the period: (i) 135,190 outstanding options to purchase the Company's common stock, (ii) 200,360 common shares attributable to unvested performance awards and (iii) 1,087,401 common shares related to the 2013 redemption of the Convertible Senior Notes, representing the weighted average portion of the year that is not included in the basic weighted average common shares outstanding.

Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 930	$ (799)	$ 243
Other comprehensive activity:
Net hedge (gains) losses included in continuing operations	0	0	5
Income tax (benefit) provision	0	0	(2)
Other comprehensive activity	0	0	3
Comprehensive income (loss)	930	(799)	246
Comprehensive income attributable to the noncontrolling interests	0	(39)	(51)
Comprehensive income (loss) attributable to common stockholders	$ 930	$ (838)	$ 195

Consolidated Statements Of Stockholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Pioneer Southwest [Member] Additional Paid-In Capital [Member]
Beginning Balance at Dec. 31, 2011	$ 5,651	$ 1	$ 3,614	$ (458)	$ 2,335	$ (3)	$ 162
Beginning Balance, shares at Dec. 31, 2011	122,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared ($0.08 per share)	(10)				(10)
Exercise of long-term incentive plan stock options and employee stock purchases, shares	0
Exercise of long-term incentive plan stock options and employee stock purchases	7		(1)	11	(3)
Purchase of treasury stock, shares	(1,000,000)
Purchase of treasury stock	(63)			(63)			0
Tax benefits related to stock-based compensation	58		58
Deferred tax provision attributable to 2008 Pioneer Southwest initial public offering	(49)		(49)					(49)
Pioneer Southwest merger transaction costs								0
Pioneer Southwest noncontrolling interest transferred to APIC								0
Deferred tax benefit associated with the Pioneer Southwest merger	0							0
Compensation costs:
Vested compensation awards, net, shares	2,000,000
Vested compensation awards, net	0	0	0
Compensation costs included in net income	63		62				1
Cash distributions to noncontrolling interests	(36)						(36)
Net income (loss)	243				192		51
Deferred hedging activity, net of tax:
Net hedge (gains) losses included in continuing operations	3					3	0
Ending Balance at Dec. 31, 2012	5,867	1	3,684	(510)	2,514	0	178
Ending Balance, shares at Dec. 31, 2012	123,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues	10,350,000
Issuance of Common Stock	1,281	0	1,281
Dividends declared ($0.08 per share)	(11)				(11)
Exercise of long-term incentive plan stock options and employee stock purchases, shares	0
Exercise of long-term incentive plan stock options and employee stock purchases	10		0	10	0
Purchase of treasury stock, shares	0
Purchase of treasury stock	(20)			(20)			0
Conversion of 2.875% senior convertible notes, shares	5,000,000
Stock Issued During Period, Value, Conversion of Convertible Securities	0		(197)	197
Deferred tax benefit related to conversion of 2.875% senior convertible notes	38		38
Tax benefits related to stock-based compensation	18		18
Deferred tax provision attributable to 2008 Pioneer Southwest initial public offering	0							0
Issuance of treasury stock to acquire outstanding PSE units, shares	3,960,000
Issuance of treasury stock to acquire outstanding PSE units	0		(179)	179
Pioneer Southwest merger transaction costs	(4)		(4)					(4)
Pioneer Southwest noncontrolling interest transferred to APIC	0		169				(169)	169
Deferred tax benefit associated with the Pioneer Southwest merger	200		200					200
Compensation costs:
Vested compensation awards, net, shares	1,000,000
Vested compensation awards, net	0	0	0
Compensation costs included in net income	71		70				1
Cash distributions to noncontrolling interests	(36)						(36)
Net income (loss)	(799)				(838)		39
Ending Balance at Dec. 31, 2013	6,615	1	5,080	(144)	1,665	0	13
Ending Balance, shares at Dec. 31, 2013	143,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues	5,750,000
Issuance of Common Stock	980	1	979
Dividends declared ($0.08 per share)	(12)				(12)
Exercise of long-term incentive plan stock options and employee stock purchases, shares	0
Exercise of long-term incentive plan stock options and employee stock purchases	13		6	7	0
Purchase of treasury stock, shares	0
Purchase of treasury stock	(34)			(34)
Noncontrolling Interest, Decrease from Deconsolidation	(4)						(4)
Tax benefits related to stock-based compensation	19		19
Deferred tax provision attributable to 2008 Pioneer Southwest initial public offering	0							0
Pioneer Southwest merger transaction costs	(1)		(1)					(1)
Pioneer Southwest noncontrolling interest transferred to APIC								0
Deferred tax benefit associated with the Pioneer Southwest merger	0							0
Compensation costs:
Vested compensation awards, net, shares	0
Vested compensation awards, net	0	0	0
Compensation costs included in net income	84		84				0
Cash distributions to noncontrolling interests	(1)						(1)
Net income (loss)	930				930		0
Ending Balance at Dec. 31, 2014	$ 8,589	$ 2	$ 6,167	$ (171)	$ 2,583		$ 8
Ending Balance, shares at Dec. 31, 2014	149,000,000

Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 930	$ (799)	$ 243
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depletion, depreciation and amortization	1,047	889	689
Impairment of oil and gas properties	0	1,495	0
Impairment of inventory and other property and equipment	8	62	6
Exploration expenses, including dry holes	90	21	31
Deferred income taxes	552	(224)	284
Gain on disposition of assets, net	(9)	(209)	(46)
Accretion of discount on asset retirement obligations	12	12	8
Discontinued operations	251	633	520
Interest expense	17	17	36
Derivative related activity	(609)	164	69
Amortization of stock-based compensation	84	71	63
Amortization of deferred revenue	0	0	(42)
Other	34	(6)	(47)
Change in operating assets and liabilities
Accounts receivable, net	(29)	(123)	(28)
Income taxes receivable	(18)	3	(6)
Inventories	(37)	(39)	33
Prepaid expenses	(3)	(1)	1
Other current assets	1	4	14
Accounts payable	104	209	46
Interest payable	(22)	(6)	11
Income taxes payable	1	0	(10)
Other current liabilities	(38)	(27)	(38)
Net cash provided by operating activities	2,366	2,146	1,837
Cash flows from investing activities:
Proceeds from disposition of assets, net of cash sold	877	711	96
Payments for acquisitions, net of cash acquired	0	0	(297)
Distribution from (investment in) unconsolidated subsidiary	0	25	0
Additions to oil and gas properties	(3,243)	(2,639)	(2,758)
Additions to other assets and other property and equipment, net	(333)	(237)	(297)
Net cash used in investing activities	(2,699)	(2,140)	(3,256)
Cash flows from financing activities:
Borrowings under long-term debt	523	467	1,777
Principal payments on long-term debt	(523)	(1,547)	(612)
Proceeds from issuance of common stock, net of issuance	980	1,281	0
Distributions to noncontrolling interests	(1)	(36)	(36)
Payments of other liabilities	0	(4)	(1)
Exercise of long-term incentive plan stock options and employee stock purchases	13	10	7
Purchase of treasury stock	(34)	(20)	(63)
Excess tax benefits from share-based payment arrangements	19	18	58
Payment of financing fees	0	0	(9)
Dividends paid	(12)	(11)	(10)
Net cash provided by financing activities	965	158	1,111
Net increase (decrease) in cash and cash equivalents	632	164	(308)
Cash and cash equivalents, beginning of period	393	229	537
Cash and cash equivalents, end of period	$ 1,025	$ 393	$ 229

Organization And Nature Of Operations	12 Months Ended
Organization And Nature Of Operations	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Nature Of Operations	NOTE A. Organization and Nature of Operations Pioneer Natural Resources Company ("Pioneer" or the "Company") is a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. The Company is a large independent oil and gas exploration and production company in the United States, with operations primarily in the Permian Basin in West Texas, the Eagle Ford Shale play in South Texas, the Raton field in southeastern Colorado and the West Panhandle field in the Texas Panhandle. The Company's objective is to maximize shareholder investment returns by maintaining financial flexibility, capital allocation discipline and enhancing net asset value through accretive drilling programs, joint ventures and acquisitions.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References+ Details

Summary Of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

NOTE B. Summary of Significant Accounting Policies

Principles of consolidation. The consolidated financial statements include the accounts of the Company and its wholly-owned and majority-owned subsidiaries since their acquisition or formation. All material intercompany balances and transactions have been eliminated.

Certain reclassifications have been made to the 2013 and 2012 financial statement and footnote amounts in order to conform them to the 2014 presentations.

Use of estimates in the preparation of financial statements. Preparation of the accompanying consolidated financial statements in conformity with generally accepted accounting principles in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Depletion of oil and gas properties and impairment of goodwill and proved and unproved oil and gas properties, in part, is determined using estimates of proved, probable and possible oil and gas reserves. There are numerous uncertainties inherent in the estimation of quantities of proved, probable and possible reserves and in the projection of future rates of production and the timing of development expenditures. Similarly, evaluations for impairment of proved and unproved oil and gas properties are subject to numerous uncertainties including, among others, estimates of future recoverable reserves and commodity price outlooks. Actual results could differ from the estimates and assumptions utilized.

Cash and cash equivalents. The Company's cash and cash equivalents include depository accounts held by banks and marketable securities with original issuance maturities of 90 days or less.

Accounts receivable. As of December 31, 2021 and 2013, the Company had accounts receivable - trade, net of allowances for bad debts, of $436 million and $431 million, respectively. The Company's accounts receivable - trade are primarily comprised of oil and gas sales receivables, joint interest receivables and other receivables for which the Company does not require collateral security.

As of both December 31, 2021 and 2013, the Company's allowances for doubtful accounts totaled $1 million. The Company establishes allowances for bad debts equal to the estimable portions of accounts receivable for which failure to collect is considered probable. The Company estimates the portions of joint interest receivables for which failure to collect is probable based on percentages of joint interest receivables that are past due. The Company estimates the portions of other receivables for which failure to collect is probable based on the relevant facts and circumstances surrounding the receivable. Allowances for doubtful accounts are recorded as reductions to the carrying values of the receivables included in the Company's consolidated balance sheets and as charges to other expense in the consolidated statements of operations in the accounting periods during which failure to collect an estimable portion is determined to be probable.

Inventories. The Company's inventories consist of materials, supplies and commodities. The Company's materials and supplies inventory is primarily comprised of oil and gas drilling or repair items such as tubing, casing, proppant used to fracture-stimulate oil and gas wells, chemicals, operating supplies and ordinary maintenance materials and parts. The materials and supplies inventory is primarily acquired for use in future drilling operations or repair operations and is carried at the lower of cost or market, on a first-in, first-out cost basis. Valuation allowances for materials and supplies inventories are recorded as reductions to the carrying values of the materials and supplies inventories in the Company's consolidated balance sheets and as charges to other expense in the accompanying consolidated statements of operations.

Commodity inventories are carried at the lower of cost or market, on a first-in, first-out basis. The Company's commodity inventories consist of oil, natural gas liquids ("NGLs") and gas volumes held in storage or as linefill in pipelines. Any valuation allowances of commodity inventories are recorded as reductions to the carrying values of the commodity inventories included in the Company's consolidated balance sheets and as charges to other expense in the consolidated statements of operations.

The following table presents the Company's materials and supplies and commodity inventories as of December 31, 2021 and 2013:



	As of December 31,
	2014		2013
	(in millions)
Materials and supplies (a)	$	223	$	211
Commodities	18		13
Less: Noncurrent materials and supplies (b)	—		(4		)
	$	241	$	220

____________________


(a)	As of December 31, 2021 and 2013, the Company's materials and supplies inventories were net of valuation allowances of $22 million and $32 million, respectively. See Note D for additional information regarding inventory impairments.


(b)	Included in other noncurrent assets in the Company's accompanying consolidated balance sheet.

Oil and gas properties. The Company utilizes the successful efforts method of accounting for its oil and gas properties. Under this method, all costs associated with productive wells and nonproductive development wells are capitalized while nonproductive exploration costs and geological and geophysical expenditures are expensed. The Company capitalizes interest on expenditures for significant development projects, generally when the underlying project is sanctioned, until such projects are ready for their intended use.

The Company does not carry the costs of drilling an exploratory well as an asset in its consolidated balance sheets following the completion of drilling unless both of the following conditions are met:


(i)	The well has found a sufficient quantity of reserves to justify its completion as a producing well.


(ii)	The Company is making sufficient progress assessing the reserves and the economic and operating viability of the project.

Due to the capital intensive nature and the geographical location of certain projects, it may take an extended period of time to evaluate the future potential of an exploration project and the economics associated with making a determination on its commercial viability. In these instances, the project's feasibility is not contingent upon price improvements or advances in technology, but rather the Company's ongoing efforts and expenditures related to accurately predicting the hydrocarbon recoverability based on well information, gaining access to other companies' production data in the area, transportation or processing facilities and/or getting partner approval to drill additional appraisal wells. These activities are ongoing and are being pursued constantly. Consequently, the Company's assessment of suspended exploratory well costs is continuous until a decision can be made that the project has found sufficient proved reserves to sanction the project or is noncommercial and is charged to exploration and abandonments expense. See Note F for additional information regarding the Company's suspended exploratory well costs.

The Company owns interests in six gas processing plants and eight treating facilities. The Company is the operator of one of the gas processing plants and all eight of the treating facilities. The Company's ownership interests in the gas processing plants and treating facilities are primarily to accommodate handling the Company's gas production and thus are considered a component of the capital and operating costs of the respective fields that they service. To the extent that there is excess capacity at a plant or treating facility, the Company attempts to process third party gas volumes for a fee to keep the plant or treating facility at capacity. All revenues and expenses derived from third party gas volumes processed through the plants and treating facilities are reported as components of oil and gas production costs. Third party revenues generated from the processing plants and treating facilities in continuing operations for the years ended December 31, 2021, 2013 and 2012 were $56 million, $53 million and $31 million, respectively. Third party expenses attributable to the processing plants and treating facilities in continuing operations for the same respective periods were $24 million, $21 million and $19 million. The capitalized costs of the plants and treating facilities are included in proved oil and gas properties and are depleted using the unit-of-production method along with the other capitalized costs of the field that they service.

The capitalized costs of proved properties are depleted using the unit-of-production method based on proved reserves. Costs of significant nonproducing properties, wells in the process of being drilled and development projects are excluded from depletion until the related project is completed and proved reserves are established or, if unsuccessful, impairment is determined.

Proceeds from the sales of individual properties and the capitalized costs of individual properties sold or abandoned are credited and charged, respectively, to accumulated depletion, depreciation and amortization, if doing so does not materially impact the depletion rate of an amortization base. Generally, no gain or loss is recognized until an entire amortization base is sold. However, gain or loss is recognized from the sale of less than an entire amortization base if the disposition is significant enough to materially impact the depletion rate of the remaining properties in the amortization base.

The Company performs assessments of its long-lived assets to be held and used, including proved oil and gas properties accounted for under the successful efforts method of accounting, whenever events or circumstances indicate that the carrying value of those assets may not be recoverable. An impairment loss is indicated if the sum of the expected future cash flows is less than the carrying amount of the assets. In these circumstances, the Company recognizes an impairment loss for the amount by which the carrying amount of the assets exceeds the estimated fair value of the assets. See Note D for additional information regarding the Company's impairment of proved oil and gas properties.

Unproved oil and gas properties are periodically assessed for impairment on a project-by-project basis. These impairment assessments are affected by the results of exploration activities, commodity price outlooks, planned future sales or expirations of all or a portion of such projects. If the estimated future net cash flows attributable to such projects are not expected to be sufficient to fully recover the costs invested in each project, the Company will recognize an impairment loss at that time.

Goodwill. During 2004, the Company recorded goodwill associated with a business combination, which represents the cost of an acquired entity over the net amounts assigned to assets acquired and liabilities assumed. In accordance with GAAP, goodwill is not amortized to earnings, but is assessed for impairment whenever events or circumstances indicate that impairment of the carrying value of goodwill is likely, but no less often than annually. If the carrying value of goodwill is determined to be impaired, it is reduced for the impaired value with a corresponding charge to earnings in the period in which it is determined to be impaired. During the third quarter of 2014, the Company performed its annual qualitative assessment of goodwill to determine whether it was more likely than not that the fair value of the Company's reporting unit was less than its carrying amount as a basis for determining whether it was necessary to perform the two-step goodwill impairment test. The Company reevaluated this assessment during the fourth quarter of 2014 due to reductions in (i) management's longer-term commodity price outlooks ("Management's Price Outlooks") and (ii) the Company's common stock price. Based upon the results of the assessments, the Company determined that it was not likely that the Company's goodwill was impaired.

The Company reduced the carrying value of goodwill by $2 million and $24 million during the years ended December 31, 2021 and 2013, respectively, reflecting the portion of the Company's goodwill related to assets sold or included in assets held for sale. During 2014, the reduction of goodwill primarily reflected the Company's goodwill related to the Hugoton field assets sold in September 2014, while the 2013 reduction was primarily associated with the sale of 40 percent of Pioneer's interest in 207,000 net acres leased by the Company in the horizontal Wolfcamp Shale play in the southern portion of the Spraberry field in West Texas, and the planned sales of the Company's Alaska subsidiary and Barnett Shale net assets that were subsequently completed during 2014. See Note C for additional information regarding the Company's divestitures.

Other property and equipment, net. Other property and equipment is recorded at cost. At December 31, 2021 and 2013, respectively, the net carrying value of other property and equipment consisted of the following:



	As of December 31,
	2014 (a)		2013 (a)
	(in millions)
Proved and unproved sand properties (b)	$	469	$	451
Land and buildings	440		345
Equipment and rigs (c)	348		313
Transportation equipment	35		41
Furniture and fixtures	70		48
Leasehold improvements	29		26
	$	1,391	$	1,224

____________________


(a)	At December 31, 2021 and 2013, other property and equipment was net of accumulated depreciation of $563 million and $458 million, respectively.


(b)	Includes sand mines, facilities and unproved leaseholds that primarily provide the Company and other unrelated customers with proppant used in the fracture stimulation of oil and gas wells.

(c)

Includes well servicing rigs and equipment and fracture stimulation equipment including assets owned by subsidiaries that provide pumping and well services on Company-operated properties. As of December 31, 2021, the Company owned eight fracture stimulation fleets and other oilfield services equipment, including pulling units, fracture stimulation tanks, water transport trucks, hot oilers, blowout preventers, construction equipment and fishing tools.

The primary purposes of the Company's sand mines and pumping and well services operations are to accommodate the Company's drilling and producing operations by increasing the availability of supplies, equipment and services, rather than being dependent on third-party availability, and to contain associated costs. All intercompany gains or losses of the Company's sand mines and pumping and well services operations are eliminated.

Earnings from sales of proppant to third-party customers and from providing pumping and well services to working interest owners in Company-operated properties are included in interest and other income in the accompanying consolidated statements of operations.

The capitalized costs of proved sand properties are depleted using the unit-of-production method based on proved sand reserves. Equipment items are generally depreciated by individual component on a straight line basis over their economic useful lives, which are generally from two to 12 years. Leasehold improvements are amortized over the lesser of their economic useful lives or the underlying terms of the associated leases.

The Company evaluates other property and equipment for potential impairment whenever indicators of impairment are present. Circumstances that could indicate potential impairment include: significant adverse changes in industry trends and the economic outlook; legal actions; regulatory changes; and significant declines in utilization rates or oil and gas prices. If it is determined that other property and equipment is potentially impaired, the Company performs an impairment evaluation by estimating the future undiscounted net cash flow from the use and eventual disposition of other property and equipment grouped at the lowest level that cash flows can be identified. If the sum of the future undiscounted net cash flows is less than the net book value of the property, an impairment loss is recognized for the excess, if any, of the assets' net book value over its estimated fair value.

Investment in unconsolidated affiliate. During 2010, the Company formed EFS Midstream LLC ("EFS Midstream") to own and operate gas and liquids gathering, treating and transportation assets in the Eagle Ford Shale play in South Texas. During June 2010, the Company sold a 49.9 percent member interest in EFS Midstream to an unaffiliated third party for $46 million of cash proceeds. Associated therewith, the Company recorded a deferred gain that is being amortized as a reduction in production costs over a 20 year period, representing the term of a continuing commitment of Pioneer to deliver production volumes through EFS Midstream handling and gathering facilities. As of December 31, 2021, the deferred gain totaled $39 million and is included in other current and noncurrent liabilities in the Company's accompanying consolidated balance sheet.

The Company does not have control of EFS Midstream. Consequently, the Company accounts for this investment under the equity method of accounting for investments in unconsolidated affiliates. Under the equity method, the Company's investment in unconsolidated affiliates is increased for investments made and the investor's share of the investee's net income, and decreased for distributions received, the carrying value of member interests sold and the investor's share of the investee's net losses.

The Company's equity interest in the net income or loss of EFS Midstream is recorded in interest and other income, net of eliminations of the profit associated with gathering, treating and transportation fees charged to the Company by EFS Midstream, in the accompanying consolidated statements of operations. See Note M for the Company's equity interest in the net income of EFS Midstream for the years ended December 31, 2014, 2013 and 2012.

During November 2014, the Company announced that it is pursuing the divestment of its 50.1 percent share of EFS Midstream. The Company is marketing its equity investment in EFS Midstream and no assurance can be given that a sale will be completed in accordance with the Company's plans or on terms and at a price acceptable to the Company.

Asset retirement obligations. The Company records a liability for the fair value of an asset retirement obligation in the period in which it is incurred if a reasonable estimate of fair value can be made. Asset retirement obligations are generally capitalized as part of the carrying value of the long-lived asset to which it relates. Conditional asset retirement obligations meet the definition of liabilities and are recognized when incurred if their fair values can be reasonably estimated.

The Company records the current and noncurrent portions of asset retirement obligations in other current liabilities and other liabilities, respectively, in the accompanying consolidated balance sheets and expenditures are classified as cash used in operating activities in the accompanying consolidated statements of cash flows. See Note I for additional information about the Company's asset retirement obligations.

Treasury stock. Treasury stock purchases are recorded at cost. Upon reissuance, the cost of treasury shares held is reduced by the average purchase price per share of the aggregate treasury shares held.

Issuance of common stock. In November 2014 and February 2013, the Company issued 5.75 million shares and 10.35 million shares of its common stock, respectively, and realized cash proceeds of $980 million and $1.3 billion, respectively, net of associated underwriting and offering expenses.

Noncontrolling interest in consolidated subsidiaries. The Company owns the majority interests in certain subsidiaries with operations in the United States. Prior to December 17, 2013, the Company owned a 0.1 percent general partner interest and a 52.4 percent limited partner interest in Pioneer Southwest Energy Partners L.P. ("Pioneer Southwest") and consolidated the financial position, results of operations and cash flows of Pioneer Southwest with those of Pioneer. Pioneer Southwest owned proved and unproved oil and gas properties in the Spraberry field in the Permian Basin of West Texas. On December 17, 2013, the holders of a majority of the outstanding common units of Pioneer Southwest approved an amended agreement and plan of merger, pursuant to which (i) all of the then outstanding common units of Pioneer Southwest were canceled and converted into the right to receive 0.2325 of a share of common stock of the Company and (ii) Pioneer Southwest became a wholly-owned subsidiary of the Company. The changes in the Company's ownership of Pioneer Southwest were accounted for by eliminating the noncontrolling interest attributable to Pioneer Southwest. See Note C for additional information about Pioneer Southwest and the amended agreement and plan of merger.

Noncontrolling interests in the net assets of consolidated subsidiaries totaled $8 million and $13 million as of December 31, 2021 and 2013, respectively. For the year ended December 31, 2021, the Company recorded a nominal net loss attributable to the noncontrolling interests, as compared to $39 million and $51 million of net income attributable to the noncontrolling interests for the years ended December 31, 2021 and 2012, respectively. The decrease in income attributable to noncontrolling interests for the year ended December 31, 2014, as compared to 2013 and 2012, is due to the Company's acquisition of all of the outstanding common units of Pioneer Southwest not owned by the Company in December 2013.

In accordance with GAAP, the Company records transfers of any gains or losses, net of taxes, from noncontrolling interests in consolidated subsidiaries to additional paid in capital proportionate to the ownership after giving effect to the purchase or sale of common units. The following table presents the Company's net income or loss attributable to common stockholders adjusted for changes in equity as a result of transactions that changed the Company's ownership interest in Pioneer Southwest:



	Year Ended December 31,
	2014			2013			2012
	(in millions)
Net income (loss) attributable to common stockholders	$	930		$	(838	)	$	192
Transfers from the noncontrolling interest in consolidated subsidiaries:
Decrease in additional paid-in capital for deferred taxes recognized attributable to Pioneer Southwest's 2008 initial public offering of 9.5 million common units	—			—			(49		)
Increase in additional paid-in capital from Pioneer Southwest merger	—			169			—
Increase in additional paid-in capital from deferred taxes recognized attributable to Pioneer Southwest merger	—			200			—
Decrease in additional paid-in capital from Pioneer Southwest merger transaction costs	(1		)	(4		)	—
Net increase (decrease) in equity from transactions with noncontrolling interests	(1		)	365			(49		)
Net income (loss) attributable to common stockholders and changes in equity from transactions with noncontrolling interests	$	929		$	(473	)	$	143

Revenue recognition. The Company recognizes revenue when it is realized or realizable and earned. Revenues are considered realized or realizable and earned when: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred or services have been rendered, (iii) the seller's price to the buyer is fixed or determinable and (iv) collectability is reasonably assured.

The Company uses the entitlements method of accounting for oil, NGLs and gas revenues. Sales proceeds in excess of the Company's entitlement are included in other liabilities and the Company's share of sales taken by others is included in other assets in the accompanying consolidated balance sheets. The Company had no material oil, NGL or gas entitlement assets or liabilities as of December 31, 2021 or 2013.

The Company enters into purchase transactions with third parties and separate sale transactions with third parties to satisfy unused pipeline capacity commitments and to diversify a portion of the Company's WTI oil sales to a Gulf Coast market price. Revenues and expenses from these transactions are presented on a gross basis as the Company acts as a principal in the transaction by assuming the risk and rewards of ownership, including credit risk, of the commodities purchased and assuming responsibility to deliver the commodities sold. Deficiency payments on excess pipeline capacity are included in other expense in the accompanying consolidated statements of operations. See Note N for further information on transportation commitment charges.

Derivatives. All derivatives are recorded in the accompanying consolidated balance sheets at estimated fair value. Effective February 1, 2009, the Company discontinued hedge accounting on all of its then-existing hedge contracts. The effective portions of the discontinued deferred hedges as of February 1, 2009 were included in accumulated other comprehensive income (loss) ("AOCI - Hedging") and were transferred to earnings during the same periods in which the forecasted hedged transactions were recognized in the Company's earnings. During 2012, the remaining AOCI - Hedging losses were transferred to earnings. Since discontinuing hedge accounting, the Company has recognized all changes in the fair values of its derivative contracts as gains or losses in the earnings of the periods in which they occur.

The Company classifies the fair value amounts of derivative assets and liabilities executed under master netting arrangements as net current or noncurrent derivative assets or net current or noncurrent derivative liabilities, whichever the case may be, by commodity and counterparty. Net derivative asset values are determined, in part, by utilization of the derivative counterparties' credit-adjusted risk-free rate curves and net derivative liabilities are determined, in part, by utilization of the Company's credit-adjusted risk-free rate curve. The credit-adjusted risk-free rate curves for the Company and the counterparties are based on their independent market-quoted credit default swap rate curves plus the United States Treasury Bill yield curve as of the valuation date. See Note E for additional information about the Company's derivative instruments.

Environmental. The Company's environmental expenditures are expensed or capitalized depending on their future economic benefit. Expenditures that relate to an existing condition caused by past operations and that have no future economic benefits are expensed. Expenditures that extend the life of the related property or mitigate or prevent future environmental contamination are capitalized. Liabilities for expenditures that will not qualify for capitalization are recorded when environmental assessment and/or remediation is probable and the costs can be reasonably estimated. Such liabilities are undiscounted unless the timing of cash payments for the liability is fixed or reliably determinable. Environmental liabilities normally involve estimates that are subject to revision until settlement occurs.

Stock-based compensation. Stock-based compensation expense is being recognized on restricted stock, restricted stock units, performance units and stock option awards that are expected to be settled in the Company's common stock ("Equity Awards") in the Company's financial statements on a straight line basis over the awards' vesting periods based on their fair values on the dates of grant or modification, as applicable. Stock-based compensation awards generally vest over a period of three years. The amount of stock-based compensation expense recognized at any date is approximately equal to the ratable portion of the grant date value of the award that is vested at that date.

Stock-based compensation liability awards ("Liability Awards") are restricted stock awards that are expected to be settled in cash on their vesting dates, rather than in common stock. Liability Awards are recorded as accounts payable—affiliates based on the vested portion of the fair value of the awards on the balance sheet date. The fair values of Liability Awards are updated at each balance sheet date and changes in the fair values of the vested portions of the awards are recorded as increases or decreases to stock-based compensation expense.

The Company utilizes (i) the Black-Scholes option pricing model to measure the fair value of stock options, (ii) the prior day's closing stock price on the date of grant for the fair value of Equity Awards and Liability Awards and (iii) the Monte Carlo simulation method for the fair value of performance unit awards.

Segments. Operating segments are defined as components of an enterprise that (i) engage in activities from which it may earn revenues and incur expenses (ii) for which separate operational financial information is available and is regularly evaluated by the chief operating decision maker for the purpose of allocating resources and assessing performance.

Based upon how the Company is organized and managed, the Company has only one reportable operating segment, which is oil and gas exploration and production. The Company considers its vertical integration services as ancillary to its oil and gas exploration and producing activities and manages these services to support such activities. In addition, the Company has a single, company-wide management team that allocates capital resources to maximize profitability and measures financial performance as a single enterprise.

Assets held for sale and discontinued operations. On the date at which the Company meets all the held for sale criteria, the Company discontinues the recording of depletion and depreciation of the assets or asset group to be sold and reclassifies the assets and related liabilities to be sold as held for sale on the accompanying consolidated balance sheets. The assets and liabilities are measured at the lower of their carrying amount or estimated fair value less cost to sell.

In addition, after determining that held for sale criteria has been met, the Company considers whether the assets held for sale meet the criteria to be considered discontinued operations. If the assets held for sale are considered discontinued operations, the Company classifies the results of operations from the assets held for sale as income or loss from discontinued operations, net of tax in the accompanying consolidated statements of operations for the current period and all prior periods. See Note C for additional information about the Company's divestitures.

New accounting pronouncements. In February 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-02, "Consolidation (Topic 810): Amendments to the Consolidation Analysis." ASU 2015-02 affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. ASU 2015-02 is effective for periods beginning after December 15, 2021 with early adoption permitted. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements.

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)," which supersedes the revenue recognition requirements in Accounting Standards Codification ("ASC") Topic 605, "Revenue Recognition," and most industry-specific guidance. ASU 2014-09 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB ASC. The new guidance is effective for annual reporting periods beginning after December 15, 2021 for public companies. Early adoption is not permitted. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2014-09. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements or decided upon the method of adoption.

In April 2014, the FASB issued ASU 2014-08, "Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU 2014-08 prospectively changes the criteria for reporting discontinued operations while enhancing disclosures around disposals of assets whether or not the disposal meets the definition of a discontinued operation. ASU 2014-08 is effective for annual and interim periods beginning after December 31, 2021 with early adoption permitted but only for disposals that have not been reported in financial statements previously issued. The impact of this guidance on the Company's consolidated financial statements will depend on the size and nature of the Company's disposal transactions in the future, which the Company cannot accurately predict. Several of the Company's past dispositions that were treated as discontinued operations may not have been classified as such had the new guidance been in effect.

Acquisitions and Divestitures

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Acquisition and Divestitures [Text Block]

NOTE C. Acquisitions and Divestitures

Divestitures Recorded in Continuing Operations

The Company recorded net gains on the disposition of assets in continuing operations of $9 million, $209 million and $46 million during the years ended December 31, 2021, 2013 and 2012, respectively. The following describes the significant divestitures included in continuing operations:

•

Vertical drilling rigs. During December 2013, the Company committed to a plan to sell the Company's majority interest in Sendero Drilling Company, LLC ("Sendero") to Sendero's minority interest owner. At December 31, 2013, the assets and liabilities of Sendero were classified as held for sale at their estimated fair value. In March 2014, the Company completed the sale of Sendero for cash proceeds of $31 million . As part of the sales agreement, the Company committed to lease from Sendero 12 vertical rigs through December 31, 2021 and eight vertical rigs in 2016. See Note D for information about impairment charges related to Sendero.


•	Permian Basin. During February 2014, the Company completed the sale of proved and unproved properties in Gaines and Dawson counties in the Spraberry field in West Texas for cash proceeds of $72 million, which resulted in a gain of $2 million on the unproved property sold.

•

Southern Wolfcamp. In January 2013, the Company signed an agreement with Sinochem Petroleum USA LLC ("Sinochem") to sell 40 percent of Pioneer's interest in 207,000 net acres leased by the Company in the horizontal Wolfcamp Shale play in the southern portion of the Spraberry field in West Texas for total consideration of $1.8 billion. In May 2013, the Company completed the sale for cash proceeds of $624 million, which resulted in a gain of $181 million related to the unproved property interests conveyed to Sinochem. Sinochem is paying the remaining $1.2 billion of the transaction price by carrying 75 percent of Pioneer's portion of ongoing drilling and facilities costs attributable to the Company's joint operations with Sinochem in the southern portion of the horizontal Wolfcamp Shale play. At December 31, 2014, the unused carry balance totaled $575 million.


•	West Panhandle. During the first quarter of 2013, the Company completed a sale of its interest in unproved oil and gas properties adjacent to the Company's West Panhandle field operations for net cash proceeds of $38 million, which resulted in a gain of $22 million.


•	Eagle Ford Shale. In January 2012, the Company sold a portion of its interest in an unproved oil and gas property in the Eagle Ford Shale play to unaffiliated third parties for cash proceeds of $55 million, which resulted in a gain of $43 million.


•	Other. During 2014, 2013 and 2012, the Company sold other proved and unproved properties, inventory and other property and equipment and recorded net gains of $4 million, $5 million and $3 million, respectively.

Divestitures Recorded in Discontinued Operations

The Company has reflected its Hugoton, Barnett Shale, Pioneer Alaska and Pioneer South Africa results of operations as discontinued operations in the accompanying consolidated statements of operations.

Hugoton. In September 2014, the Company completed the sale of its net assets in the Hugoton field in southwest Kansas for cash proceeds of $328 million, including normal closing adjustments. See Note D for information about impairment charges on the Hugoton assets.

Barnett Shale. During the fourth quarter of 2013, the Company committed to a plan to divest of its net assets in the Barnett Shale field in North Texas. In September 2014, the Company completed the sale of its Barnett Shale net assets for cash proceeds of $150 million, including normal closing adjustments. See Note D for information about impairment charges on the Barnett Shale assets. Also included in discontinued operations in 2013 is the sale of the Company's interest in certain proved and unproved oil and gas properties in the Barnett Shale field for net cash proceeds of $34 million, which resulted in a gain of $9 million on the unproved properties sold.

Alaska. During the fourth quarter of 2013, the Company committed to a plan to sell 100 percent of the capital stock in Pioneer's Alaska subsidiary ("Pioneer Alaska"). In April 2014, the Company completed the sale of Pioneer Alaska for cash proceeds of $267 million, including normal closing and other adjustments. See Note D for information about impairment charges on Pioneer Alaska. The recasting of Pioneer Alaska results to income (loss) from discontinued operations includes the sale of the Company's interest in the Cosmopolitan Unit in the Cook Inlet of Alaska in August 2012 for cash proceeds of $10 million, which, together with certain Company obligations assumed by the purchasers, resulted in a gain of $13 million.

South Africa. During the first quarter of 2012, the Company agreed to sell its net assets in South Africa ("Pioneer South Africa"), effective January 1, 2012, for $60 million of cash proceeds before normal closing and other adjustments, and the buyer's assumption of certain liabilities of the Company's South Africa subsidiaries. In August 2012, the Company completed the sale of Pioneer South Africa for cash proceeds of $16 million, including normal closing adjustments for cash revenues and costs and expenses from the effective date through the date of the sale, resulting in a gain of $29 million.

The following table represents the components of the Company's discontinued operations for the years ended December 31, 2021, 2013 and 2012:



	Year Ended December 31,
	2014			2013			2012
	(in millions)
Revenues and other income:
Oil and gas	$	198		$	329		$	349
Interest and other (a)	31			38			29
Gain on disposition of assets, net	9			9			41
	238			376			419
Costs and expenses:
Oil and gas production	60			117			107
Production and ad valorem taxes	12			19			19
Depletion, depreciation and amortization	11			122			121
Impairment of oil and gas properties (b)	305			729			533
Exploration and abandonments	4			54			109
General and administrative	3			12			6
Accretion of discount on asset retirement obligations	1			1			3
Other	13			9			3
	409			1,063			901
Loss from discontinued operations before income taxes	(171		)	(687		)	(482		)
Current tax provision	—			(6		)	(10		)
Deferred tax benefit	60			255			191
Loss from discontinued operations	$	(111	)	$	(438	)	$	(301	)

____________________


(a)	Primarily comprised of Alaskan Petroleum Production Tax credits on qualifying capital expenditures.

(b)

Represents noncash impairment charges of $97 million and $539 million on Pioneer Alaska net assets during the years ended December 31, 2021 and 2013, respectively, noncash impairment charges of $174 million, $190 million and $533 million on the Company's net assets in the Barnett Shale field during the years ended December 31, 2021, 2013 and 2012, respectively, and a noncash impairment charge of $34 million on the Company's net assets in the Hugoton field during the year ended December 31, 2014. See Note D for additional information regarding the noncash impairment charges.

As of December 31, 2013, the carrying values of the Company's ownership in Pioneer Alaska, the Barnett Shale field and Sendero were included in assets and liabilities held for sale in the accompanying consolidated balance sheet and were comprised of the following (the Company had no assets held for sale as of December 31, 2021):



	December 31, 2021
	(in millions)
Composition of assets included in assets held for sale:
Current assets (excluding cash and cash equivalents)	$	58
Property, plant and equipment	526
Total assets	$	584

Composition of liabilities included in liabilities held for sale:
Current liabilities	$	29
Other liabilities	10
Total liabilities	$	39

Acquisitions

Affiliated Partnerships. In December 2014, the Company acquired the remaining limited partner interests in five affiliated partnerships for $54 million and caused the partnerships to be merged with and into a wholly-owned subsidiary of the Company.

Pioneer Southwest Merger Transaction. In December 2013, the Company completed the acquisition of all of the outstanding common units of Pioneer Southwest not already owned by the Company, through a merger of a wholly-owned subsidiary of the Company into Pioneer Southwest, the result of which was that Pioneer Southwest became a wholly-owned subsidiary of the Company. All of the common units outstanding as of the closing of the merger, except for the common units owned by the Company, were canceled and converted into the right to receive 0.2325 of a share of common stock of the Company per common unit (the "Conversion Ratio"). Consequently, in December 2013, the Company issued an aggregate of 3.96 million shares of its common stock to Pioneer Southwest unitholders.

The Company subsequently caused Pioneer Southwest, its general partner and all of Pioneer Southwest's subsidiaries to be merged with and into a wholly-owned subsidiary of the Company, the result of which was that all common units of Pioneer Southwest were canceled and the Company no longer holds any common units.

Premier Silica Business Combination. In April 2012, a wholly-owned subsidiary of the Company acquired an industrial sand mining business that is now named Premier Silica LLC ("Premier Silica"). Premier Silica's primary mine operations are in Brady, Texas. The Brady mine facilities primarily produce, process and provide sand to the Company for use as proppant in its fracture stimulation of oil and gas wells in Texas. Premier Silica's sand production that is in excess of the Company's sand needs for fracture stimulation and sand production that is not usable for fracture stimulation is primarily sold to third parties for industrial and recreational purposes. The aggregate purchase price of Premier Silica was $297 million, including closing adjustments.

Disclosures About Fair Value Measurements

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Disclosures About Fair Value Measurements

NOTE D. Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or the price paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are based upon inputs that market participants use in pricing an asset or liability, which are characterized according to a hierarchy that prioritizes those inputs based on the degree to which they are observable. Observable inputs represent market data obtained from independent sources, whereas unobservable inputs reflect a company's own market assumptions, which are used if observable inputs are not reasonably available without undue cost and effort. The three input levels of the fair value hierarchy are as follows:


•	Level 1 - quoted prices for identical assets or liabilities in active markets.


•	Level 2 - quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (e.g. interest rates) and inputs derived principally from or corroborated by observable market data by correlation or other means.


•	Level 3 - unobservable inputs for the asset or liability.

Assets and liabilities measured at fair value on a recurring basis. The fair value input hierarchy level to which an asset or liability measurement in its entirety falls is determined based on the lowest level input that is significant to the measurement in its entirety.

The following tables present the Company's assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2021 and 2013 for each of the fair value hierarchy levels:



	Fair Value Measurements at December 31, 2021 Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at December 31, 2021
	(in millions)
Assets:
Commodity derivatives	$	—	$	759	$	—	$	759
Deferred compensation plan assets	70		—		—		70
Total assets	70		759		—		829
Liabilities:
Commodity derivatives	—		2		—		2
Interest rate derivatives	—		3		—		3
Total liabilities	—		5		—		5
Total recurring fair value measurements	$	70	$

Consolidated Statements Of Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share	$ 0.08	$ 0.08	$ 0.08