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Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2022
Fair Value Disclosures [Abstract]  
Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure

    

December 31, 2021

    

September 30, 2022

Carrying

Fair

Carrying

Fair

amount

value

amount

value

(In millions)

Cash, cash equivalents and restricted cash

$

412.6

$

412.6

$

344.4

$

344.4

Long-term debt - Fixed rate Senior Notes

 

448.8

 

460.2

 

390.2

 

341.4