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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
12 Months Ended
Dec. 31, 2023
FAIR VALUE OF FINANCIAL INSTRUMENTS  
Schedule of fair value measurement

Quoted Prices in

Significant

Significant

Total

Active Markets

Observable 

Unobservable 

    

    Carrying Value    

    

        Total         

    

(Level 1)

    

Inputs (Level 2)

    

Inputs (Level 3)

(In millions)

December 31, 2023

Fair Value Measurements at December 31, 2023

Cash and cash equivalents

$

134.0

$

134.0

$

134.0

$

$

Restricted cash

$

2.3

$

2.3

$

2.3

$

$

Capital Construction Fund

$

599.4

$

599.4

$

599.4

$

$

Fixed rate debt

$

440.6

$

359.9

$

$

359.9

$

(In millions)

    

December 31, 2022

               Fair Value Measurements at December 31, 2022           

Cash and cash equivalents

$

249.8

$

249.8

  

$

249.8

$

$

Restricted cash

$

3.9

$

3.9

$

3.9

$

$

Capital Construction Fund

$

518.2

$

518.2

$

518.2

$

$

Fixed rate debt

$

517.5

$

427.3

$

$

427.3

$