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Derivatives and Fair Value Measurements - Carrying and Estimated Fair Values Financial Instruments (Detail) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Carrying Amount [Member]    
Derivatives Fair Value [Line Items]    
Cash and cash equivalents $ 188.3 $ 11.0
Restricted cash 16.4 48.8
Receivables less provisions 490.7 425.1
Accounts payable 377.5 311.5
Long-term debt, including current portion 1,096.1 981.8
Fair Value [Member]    
Derivatives Fair Value [Line Items]    
Cash and cash equivalents 188.3 11.0
Restricted cash 16.4 48.8
Receivables less provisions 490.7 425.1
Accounts payable 377.5 311.5
Long-term debt, including current portion $ 1,058.8 $ 1,014.4