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Long-term Debt - Principal Payments Due on Long-term Debt (Details)
$ in Millions
Sep. 30, 2024
USD ($)
Face Amount  
Long-term Debt by Maturity  
October 1 through December 31, 2024 $ 6.7
2025 237.5
2026 37.3
2027 44.4
2028 833.0
2029 41.7
Thereafter 1,414.2
Total 2,614.8
Net Amount  
Long-term Debt by Maturity  
October 1 through December 31, 2024 6.7
2025 237.0
2026 37.3
2027 44.4
2028 820.5
2029 41.7
Thereafter 1,389.9
Total $ 2,577.5