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Long-Term Debt - Annual Scheduled Principal Payments of Debt (Detail)
$ in Millions
Jun. 30, 2021
USD ($)
Debt Disclosure [Abstract]  
2021 $ 12.6
2022 27.8
2023 27.8
2024 584.2
2025 1,625.3
Thereafter 600.0
Total $ 2,877.7