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Commitments and Contingencies - Contractual Purchase Commitments (Detail)
$ in Millions
Dec. 31, 2020
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2021 $ 137.0
2022 9.3
2023 7.6
2024 6.5
2025 6.6
Thereafter 58.2
Total $ 225.2