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Commitments and Contingencies - Contractual Purchase Commitments (Detail)
$ in Millions
Dec. 31, 2019
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2020 $ 140.6
2021 15.0
2022 3.0
2023 0.9
2024 0.9
Thereafter 15.9
Total $ 176.3