The Company determines fair value based on the price that would be received from selling an asset or 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 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.

•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, typically reflecting management's estimate of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore, determined using model-based techniques, including discounted cash flow models.


	As of September 30, 2020
	Fair Value Measurement
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total

	(in millions)
Assets:
Commodity price derivatives	$	—	$	49	$	—	$	49
Deferred compensation plan assets	68		—		—		68
Investment in affiliate	67		—		—		67

Total assets	135		49		—		184
Liabilities:
Commodity price derivatives	—		65		—		65
	$	135	$	(16)	$	—	$	119


	As of December 31, 2019
	Fair Value Measurement
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total

	(in millions)
Assets:
Commodity price derivatives	$	—	$	32	$	—	$	32
Deferred compensation plan assets	85		—		—		85
Investment in affiliate	187		—		—		187
Contingent consideration	—		91		—		91
Total assets	272		123		—		395
Liabilities:
Commodity price derivatives	—		20		—		20
	$	272	$	103	$	—	$	375

Commodity price derivatives. The Company's commodity price derivatives represent oil, NGL and gas swap contracts, collar contracts, collar contracts with short puts and basis swap contracts. The asset and liability measurements for the Company's commodity price derivative contracts are determined using Level 2 inputs. The Company utilizes discounted cash flow and option-pricing models for valuing its commodity price derivatives.

The asset and liability values attributable to the Company's commodity price derivatives were determined based on inputs that include (i) the contracted notional volumes, (ii) independent active market price quotes, (iii) the applicable estimated credit-adjusted risk-free rate yield curve and (iv) the implied rate of volatility inherent in the collar contracts and collar contracts with short puts, which is based on active and independent market-quoted volatility factors.

Deferred compensation plan assets. The Company's deferred compensation plan assets include investments in equity and mutual fund securities that are actively traded on major exchanges. The fair value of these investments is determined using Level 1 inputs based on observable prices on major exchanges.

Investment in affiliate. The Company elected the fair value option for measuring its equity method investment in ProPetro Holding Corp. ("ProPetro"). The fair value of its investment in ProPetro is determined using Level 1 inputs based on observable prices on a major exchange. See Note 11 and Note 13 for additional information.

Contingent consideration. The Company had a right to receive contingent consideration in conjunction with the South Texas Divestiture based on future oil and NGL prices during each of the five years from 2020 to 2024. The fair value of the contingent consideration was determined using Level 2 inputs based on an option pricing model using quoted future commodity prices based on active markets, implied volatility factors and counterparty credit risk assessments. In July 2020, the Company received cash proceeds of $49 million to fully satisfy the South Texas Divestiture contingent consideration receivable. See Note 3, Note 5 and Note 13 for additional information.

Assets and liabilities measured at fair value on a nonrecurring basis. Certain assets and liabilities are measured at fair value on a nonrecurring basis. These assets and liabilities are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances. These assets and liabilities can include inventory, proved and unproved oil and gas properties, goodwill and other long-lived assets that are written down to fair value when they are impaired or held for sale.

Other assets. During the nine months ended September 30, 2019, the Company recognized impairment charges of $13 million associated with inventory and other property and equipment related to the decommissioning of the Company's Brady, Texas sand mine, and $16 million related to pressure pumping assets, as they had no remaining future economic value. See Note 14 for additional information.

South Texas Divestiture. The Company recorded a deficiency fee obligation and related deficiency fee receivable in conjunction with the 2019 South Texas Divestiture. The fair value of the deficiency fee obligation and deficiency fee receivable was determined using Level 3 inputs based on a probability-weighted forecast that considers historical results, market conditions and various development plans to arrive at the estimated present value of the deficiency payments and corresponding receipts. Changes to the Company's forecasted deficiency fee obligation, as a result of the expected impact of the COVID-19 pandemic on the buyer's ability to drill economic wells, resulted in the Company recording a charge of $69 million to other expense during the nine months ended September 30, 2020. The present value of the estimated future cash payments and expected cash receipts were determined using a 3.6 percent and 3.2 percent discount rate, respectively, based on the estimated timing of future payments and receipts and the Company's counterparty credit risk assessments. See Note 3, Note 10 and Note 14 for additional information.

Proved Properties. The Company performs assessments of its 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, including cash flows from vertically integrated services that are used in the development of the assets, is less than the carrying amount of the assets, including the carrying value of the vertically integrated services. In these circumstances, the Company recognizes an impairment charge for the amount by which the carrying amount of the assets exceeds the estimated fair value of the assets.

Based on management's commodity price outlooks as of September 30, 2020, which represent longer-term commodity price outlooks that are developed based on third party future commodity price estimates as of a measurement date ("Management's Price Outlooks"), the Company determined events and circumstances did not indicate that the carrying value of the Company's proved properties were not recoverable.

Goodwill. Goodwill is assessed for impairment whenever it is likely that events or circumstances indicate the carrying value of a reporting unit exceeds its fair value, but no less often than annually. An impairment charge is recorded for the amount by which the carrying amount exceeds the fair value of a reporting unit in the period it is determined to be impaired.

Based on the Company's annual assessment of the fair value of goodwill as of July 1, 2020, the Company determined that its goodwill was not impaired. As of September 30, 2020, there were no material changes in events or circumstances that would warrant a reassessment for impairment.

There is significant uncertainty surrounding the long-term impact to global oil demand due to the effects of the COVID-19 pandemic. These conditions are negatively impacting the Company's 2020 forecasted capital activities and production levels. It is reasonably possible that the carrying value of the Company's proved oil and gas properties or goodwill could exceed their estimated fair value resulting in the need to impair their carrying values in the future. If incurred, an impairment of the Company's proved oil and gas properties or goodwill could have a material adverse effect on the Company's financial condition and results of operation.


	As of September 30, 2020				As of December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value

	(in millions)
Assets:
Cash and cash equivalents (a)	$	1,325	$	1,325	$	631	$	631


Restricted cash (a)	$	66	$	66	$	74	$	74







Liabilities:
Current portion of long-term debt:
Senior notes (b)	$	140	$	140	$	450	$	451
Long-term debt:
Convertible senior notes (b)	$	1,088	$	1,456	$	—	$	—
Senior notes (b)	$	2,060	$	2,168	$	1,839	$	1,995

(b)Fair value is determined using Level 2 inputs. The Company's senior notes are quoted, but not actively traded on major exchanges; therefore, fair value is based on periodic values as quoted on major exchanges. See Note 7 for additional information.

The Company has other financial instruments consisting primarily of receivables, payables, other current assets and liabilities that approximate fair value due to the nature of the instrument and their relatively short maturities. Non-financial assets and liabilities initially measured at fair value include assets acquired and liabilities assumed in a business combination, convertible senior notes, goodwill and asset retirement obligations.