Annual report pursuant to Section 13 and 15(d)

Detail of Certain Balance Sheet Accounts - Additional Information (Detail)

v3.10.0.1
Detail of Certain Balance Sheet Accounts - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]    
Deferred compensation plan assets $ 31.2 $ 33.6
Deferred tax assets 79.1 77.5
Deferred compensation plan liabilities 51.3 58.1
Deferred income tax liabilities $ 7.5 $ 7.8