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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2019
Fair Value Measurements [Abstract]  
Schedule Of The Carrying Amount And Estimated Fair Value Of The Company's Financial Instruments That Are Recorded At Fair Value On A Recurring Basis

Estimated Fair Value Measurements

(In millions)

Statement of Financial
‎Position Location

Carrying
‎Value

Quoted
‎Prices
‎In Active
‎Markets
‎(Level 1)

Significant
‎Other
‎Observable
‎Inputs
‎(Level 2)

Significant
‎Unobservable
‎Inputs
‎(Level 3)

As of September 30, 2019:

Financial Assets:

Investments in marketable securities

Marketable securities

$

7

$

7

$

—

$

—

Total financial assets

$

7

$

7

$

—

$

—

Financial Liabilities:

Interest rate swap contract

Other accrued liabilities

$

5

$

—

$

5

$

—

Other long-term obligations

27

—

27

—

Total financial liabilities

 

$

32

$

—

$

32

$

—

As of December 31, 2018:

Financial Assets:

Investments in marketable securities

Marketable securities

$

9 

$

9 

$

—

$

—

Total financial assets

$

9 

$

9 

$

—

$

—

Financial Liabilities:

Interest rate swap contract

Other accrued liabilities

$

2 

$

—

$

2 

$

—

Other long-term obligations

10 

—

10 

—

Total financial liabilities

 

$

12 

$

—

$

12 

$

—