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Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Estimated Fair Value of Financial Instruments The estimated fair values of our financial instruments are as follows: 

 

 

June 30, 2020

 

 

December 31, 2019

 

 

 

Carrying

amount

 

 

Estimated

fair value

 

 

Carrying

amount

 

 

Estimated

fair value

 

(Liabilities), net:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total long-term debt, including current portion

 

$

(626.3

)

 

$

(626.3

)

 

$

(610.8

)

 

$

(610.8

)

Interest rate swap contracts

 

 

(32.3

)

 

 

(32.3

)

 

 

(14.3

)

 

 

(14.3

)