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Revenue Recognition and Accounts Receivable - Additional Information (Detail) - USD ($)
$ in Millions
Jan. 01, 2020
Mar. 31, 2020
Dec. 31, 2019
Other Long-Term Assets or Other Current Assets [Member]      
Revenue Recognition And Accounts Receivable [Line Items]      
Other contract assets   $ 3.3 $ 3.7
ASU 2016-13 [Member]      
Revenue Recognition And Accounts Receivable [Line Items]      
Increase (decrease) to allowance for expected credit losses $ 1.1    
Increase (decrease) in deferred income taxes 0.2    
Decrease in retained earnings $ (0.9)