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Derivatives and Financial Instruments - Recorded Amounts and Estimated Fair Values (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Derivative [Line Items]    
Total debt $ 2,448.1 $ 894.1
Recorded Amount    
Derivative [Line Items]    
Variable rate debt 1,651.6 395.0
Fixed rate debt 819.3 507.6
Total debt 2,470.9 902.6
Fair Value    
Derivative [Line Items]    
Variable rate debt 1,651.6 395.0
Fixed rate debt 764.9 564.3
Total debt $ 2,416.5 $ 959.3