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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Carrying Amount And Estimated Fair Value Of Long Term Debt
 December 31, 2023 December 31, 2022 
 Carrying
Amount		Fair
Value		 Carrying
Amount		Fair
Value		 
Senior secured term loan B (including current portion)$571.0 $573.1 
(2)
$571.7 $564.5 
(2)
Exchangeable senior notes due 2028
222.2 292.6 
(2)
— — 
(2)
Senior secured first lien notes due 202520.8 20.7 
(1)
20.7 20.8 
(1)
Senior secured second lien notes due 2025— — 
(1)
1,191.0 1,179.0 
(1)
Senior notes due 2026299.1 288.0 
(1)
298.8 272.8 
(1)
Senior notes due 2028696.6 616.8 
(1)
695.9 562.3 
(1)
Senior notes due 2029888.4 973.0 
(1)
887.2 935.7 
(1)
Senior secured second lien notes due 2030
1,180.0 1,273.1 
(1)
— — 
(1)
Total$3,878.1 $4,037.3  $3,665.3 $3,535.1  

(1)Level 1 Fair Value hierarchy
(2)Level 2 Fair Value hierarchy