XML 42 R32.htm IDEA: XBRL DOCUMENT v3.23.1
Long-term Debt (Tables)
 3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of long-term debt instruments
The 2025 Notes and 2026 Notes consisted of the following (in millions):

 March 31, 2023 (unaudited)
Long-term debt:2026 Notes2025 Notes
     Principal$380.0 $23.3 
     Less: Unamortized debt issuance costs(7.8)(0.3)
Net carrying amount$372.2 $23.0 

 December 31, 2022
Long-term debt:2026 Notes2025 Notes
     Principal$380.0 $23.3 
     Less: Unamortized debt issuance costs(8.3)(0.4)
Net carrying amount$371.7 $22.9 


Interest expense for the three months ended March 31, 2023 and 2022 related to the 2026 Notes and 2025 Notes consisted of the following (in millions):
2026 Notes
Three Months Ended
March 31,
20232022
Coupon interest$0.1 $0.1 
Amortization of debt issuance costs0.6 0.6 
     Total interest expense recognized$0.7 $0.7 

2025 Notes
Three Months Ended
March 31,
20232022
Coupon interest$0.1 $0.1 
Amortization of debt issuance costs— — 
     Total interest expense recognized$0.1 $0.1