v3.26.1
Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments
The carrying values and estimated fair values of certain of our financial instruments were as follows (in millions):
June 30, 2026December 31, 2025
Carrying Value  Estimated Fair Value  Carrying ValueEstimated Fair Value  
2030 Second Lien Notes (1)
$1,087.6 $1,142.9 $1,086.0 $1,144.9 
Notes Receivable from ARO (2)
$357.2 $409.5 $345.0 $403.8 

(1)The estimated fair value of the 2030 Second Lien Notes (as defined in "Note 8 - Debt") was determined using quoted market prices, which are level 1 inputs.
(2)The estimated fair value of the Notes Receivable from ARO was estimated using an income approach to value the forecasted cash flows attributed to the Notes Receivable from ARO using a discount rate based on a comparable yield with a country-specific risk premium, which are considered to be level 2 inputs.