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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments
The carrying values and estimated fair values of our long-term debt instrument were as follows (in millions):
March 31,
2022
December 31,
2021
Carrying Value  Estimated Fair Value  Carrying Value  Estimated Fair Value  
Senior secured first lien notes due 2028$545.5 $569.1 $545.3 $575.7