Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Detail of Certain Balance Sheet Accounts - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Deferred compensation plan assets $ 32.0 $ 30.6
Long-term deferred tax assets 186.1 155.2
Deferred compensation plan liabilities 53.8 50.0
Deferred income tax liabilities $ 15.5 $ 15.3