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Accumulated Other Comprehensive Earnings - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Expense related to pension liability reclassified from accumulated other comprehensive earnings $ 1.8 $ 1.2
(Income) expense related to fair value of derivative investments reclassified from accumulated other comprehensive earnings (0.7) 1.8
Foreign currency translation reclassified from accumulated other comprehensive earnings $ 0.0 $ 0.0