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Fair Value Measurements
6 Months Ended
Jun. 30, 2020
Fair Value Measurements  
Fair Value Measurements

12.  Fair Value Measurements

Assets and Liabilities Accounted for at Fair Value

Our assets and liabilities that are measured at fair value on a recurring basis include the following (in millions):

June 30, 

December 31, 

    

2020

    

2019

Fair Value Measurements Using:

Quoted prices in active markets (Level 1):

Cash equivalents and money market funds

 

$

2,616

 

$

3,527

Significant other observable inputs (Level 2):

Available-for-sale securities (a)

 

397

 

350

Significant unobservable inputs (Level 3):

Redeemable preferred stock (b)

 

49

 

49

Total Assets

 

$

3,062

$

3,926

(a)Our available-for-sale securities generally mature over the next nine years.
(b)When available, Level 3 investments have been measured based on third-party investors’ recent or pending transactions in these securities, which are considered the best evidence of fair value. When this evidence is not available, we use other valuation techniques as appropriate and available. These valuation methodologies may include transactions in similar instruments, discounted cash flow techniques, third-party appraisals or industry multiples and public company comparable transactions.

See Note 9 for information related to our nonrecurring fair value measurements and the impact of impairments.

Fair Value of Debt

As of June 30, 2020 and December 31, 2019, the carrying value of our debt was $12.8 billion and $13.5 billion, respectively. The estimated fair value of our debt was approximately $13.9 billion and $14.5 billion as of June 30, 2020 and December 31, 2019, respectively.

Although we have determined the estimated fair value amounts using available market information and commonly accepted valuation methodologies, considerable judgment is required in interpreting market data to develop the estimates of fair value. Accordingly, our estimates are not necessarily indicative of the amounts that we, or holders of the instruments, could realize in a current market exchange. Furthermore, the fair value of debt instruments measured as of June 30, 2020 is particularly susceptible to variability from future measurements of fair value given elevated volatility in key market factors due to the impact the COVID-19 pandemic is having on financial markets. The use of different assumptions or estimation methodologies could have a material effect on the estimated fair values. The fair value estimates are based on Level 2 inputs of the fair value hierarchy available as of June 30, 2020 and December 31, 2019. These amounts have not been revalued since those dates, and current estimates of fair value could differ significantly from the amounts presented.