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Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Detail) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Disclosure Other Non Current Assets Schedule Of Other Non Current Assets [Abstract]    
Pension asset $ 4.0 $ 3.1
Restricted cash 0.8  
Deferred financing costs, net 0.5 0.6
Other 1.1 1.6
Total $ 6.4 $ 5.3