Derivatives and Fair Value Measurements - Carrying and Estimated Fair Values Financial Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Carrying Amount [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	$ 41.4	$ 51.2
Restricted cash	1.2	1.2
Receivables less provisions	756.5	630.8
Accounts payable	656.3	481.2
Long-term debt, including current portion	533.5	639.3
Fair Value [Member]
Derivatives Fair Value [Line Items]
Cash and cash equivalents	41.4	51.2
Restricted cash	1.2	1.2
Receivables less provisions	756.5	630.8
Accounts payable	656.3	481.2
Long-term debt, including current portion	$ 535.0	$ 666.8