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Fair Value Measurements
3 Months Ended
Mar. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements FAIR VALUE MEASUREMENTS
Assets and liabilities measured at fair value on a recurring basis
The carrying amounts and estimated fair values of the Company’s financial instruments as of March 31, 2020 and December 31, 2019 were as follows:
March 31, 2020 December 31, 2019
(in millions)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Cash and cash equivalents$ $ $ $ 
2018 revolving credit facility due April 2024149  149  34  34  
Senior notes (1)
2,148  1,460  2,228  2,085  
Derivative instruments, net401  
(2)
401  
(2)
155  
(2)
155  
(2)
(1)Excludes unamortized debt issuance costs and debt discounts.
(2)Includes $9 million in premiums paid related to certain natural gas fixed price swaps recognized as a component of derivative assets within current assets on the consolidated balance sheet.
The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value.  As presented in the tables below, this hierarchy consists of three broad levels:
Level 1 valuations - Consist of unadjusted quoted prices in active markets for identical assets and liabilities and have the highest priority.
Level 2 valuations - Consist of quoted market information for the calculation of fair market value.
Level 3 valuations - Consist of internal estimates and have the lowest priority.
The carrying values of cash and cash equivalents, including marketable securities, accounts receivable, other current assets, accounts payable and other current liabilities on the consolidated balance sheets approximate fair value because of their short-term nature.  For debt and derivative instruments, the following methods and assumptions were used to estimate fair value:
Debt: The fair values of the Company’s senior notes are based on the market value of the Company’s publicly traded debt as determined based on the market prices of the Company’s senior notes. The fair value of the Company's 4.10% Senior Notes due March 2022 is considered to be a Level 2 measurement on the fair value hierarchy.  The fair values of the Company's remaining senior notes are considered the be a Level 1 measurement. The carrying values of the borrowings under the Company’s revolving credit facility (to the extent utilized) approximates fair value because the interest rate is variable and reflective of market rates.  The Company considers the fair value of its revolving credit facility to be a Level 1 measurement on the fair value hierarchy.
Derivative Instruments: The Company measures the fair value of its derivative instruments based upon a pricing model that utilizes market-based inputs, including, but not limited to, the contractual price of the underlying position, current market prices, natural gas and liquids forward curves, discount rates such as the LIBOR curve for a similar duration of each outstanding position, volatility factors and non-performance risk. Non-performance risk considers the effect of the Company’s credit standing on the fair value of derivative liabilities and the effect of counterparty credit standing on the fair value of derivative assets. Both inputs to the model are based on published credit default swap rates and the duration of each
outstanding derivative position. As of March 31, 2020, the impact of non-performance risk on the fair value of the Company’s net derivative asset position was a net reduction of less than $1 million.
The Company has classified its derivative instruments into levels depending upon the data utilized to determine their fair values.  The Company’s fixed price swaps (Level 2) are estimated using third-party discounted cash flow calculations using the New York Mercantile Exchange (“NYMEX”) futures index for natural gas and oil derivatives and Oil Price Information Service (“OPIS”) for ethane and propane derivatives.  The Company utilizes discounted cash flow models for valuing its interest rate derivatives (Level 2).  The net derivative values attributable to the Company’s interest rate derivative contracts as of March 31, 2020 are based on (i) the contracted notional amounts, (ii) active market-quoted LIBOR yield curves and (iii) the applicable credit-adjusted risk-free rate yield curve.
The Company’s call options, two-way costless collars and three-way costless collars (Level 2) are valued using the Black-Scholes model, an industry standard option valuation model that takes into account inputs such as contract terms, including maturity, and market parameters, including assumptions of the NYMEX and OPIS futures index, interest rates, volatility and credit worthiness.  Inputs to the Black-Scholes model, including the volatility input, are obtained from a third-party pricing source, with independent verification of the most significant inputs on a monthly basis.  An increase (decrease) in volatility would result in an increase (decrease) in fair value measurement, respectively.
The Company’s basis swaps (Level 2) are estimated using third-party calculations based upon forward commodity price curves.
Assets and liabilities measured at fair value on a recurring basis are summarized below:
March 31, 2020
Fair Value Measurements Using: 
(in millions)Quoted Prices in Active Markets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)Assets (Liabilities) at Fair Value
Assets  
Purchased fixed price swaps$—  $ $—  $ 
Fixed price swaps (1)
—  384  —  384  
Two-way costless collars—  50  —  50  
Three-way costless collars—  325  —  325  
Basis swaps—  27  —  27  
Purchased call options—   —   
Liabilities
Purchased fixed price swaps—  (8) —  (8) 
Two-way costless collars—  (25) —  (25) 
Three-way costless collars—  (309) —  (309) 
Basis swaps—  (22) —  (22) 
Sold call options—  (24) —  (24) 
Purchased fixed price swaps – storage—  (1) —  (1) 
Interest rate swaps—  (1) —  (1) 
Total (2)
$—  $401  $—  $401  
(1)Includes $9 million in premiums paid related to certain natural gas fixed price swaps recognized as a component of derivative assets within current assets on the consolidated balance sheet at March 31, 2020. As certain natural gas fixed price swaps settle, the premium will be amortized and recognized as a component of gain (loss) on derivatives on the consolidated statements of operations.
(2)Includes a net fair value reduction of less than $1 million related to estimated nonperformance risk.
December 31, 2019
Fair Value Measurements Using: 
(in millions)Quoted Prices in Active Markets (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)Assets (Liabilities) at Fair Value
Assets   
Fixed price swaps (1)
$—  $124  $—  $124  
Two-way costless collars—  21  —  21  
Three-way costless collars—  210  —  210  
Basis Swaps—  32  —  32  
Purchased call options—   —   
Fixed price swaps - storage—   —   
Liabilities
Purchased fixed price swaps—  (1) —  (1) 
Fixed price swaps—  (9) —  (9) 
Two-way costless collars—  (13) —  (13) 
Three-way costless collars—  (168) —  (168) 
Basis Swaps—  (26) —  (26) 
Sold call options—  (19) —  (19) 
Total$—  $155  $—  $155  
(1)Includes $9 million in premiums paid related to certain natural gas fixed price swaps recognized as a component of derivative assets within current assets on the consolidated balance sheet at December 31, 2019. As certain natural gas fixed price swaps settle, the premium will be amortized and recognized as a component of gain (loss) on derivatives on the consolidated statements of operations.
The fair values of Level 3 derivative instruments are estimated using proprietary valuation models that utilize both market observable and unobservable parameters.  Level 3 instruments consist of net derivatives valued using pricing models incorporating assumptions that, in the Company’s judgment, reflect reasonable assumptions a marketplace participant would use. There were no Level 3 derivatives in the first quarters of 2020 and 2019.