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Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Statement of Comprehensive Income [Abstract]    
Expense related to pension liability reclassified from accumulated other comprehensive earnings $ 5.4 $ 3.7
(Income) expense related to fair value of derivative investments reclassified from accumulated other comprehensive earnings 3.0 4.2
Foreign currency translation reclassified from accumulated other comprehensive earnings $ 0.0 $ 0.0