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Debt - Debt Outstanding Matures on Calendar Year Basis (Detail)
$ in Millions
Sep. 30, 2019
USD ($)
Debt Disclosure [Abstract]  
Q3 - Q4 2019 $ 250.0
2020 74.0
2021 103.8
2022 88.3
2023 193.3
Thereafter 419.3
Total debt $ 1,128.7