Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Offsetting of Derivative Liabilities (Detail)

v3.10.0.1
Fair Value Measurements - Offsetting of Derivative Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Derivative [Line Items]    
Gross Amounts of Recognized Liabilities $ 1.7 $ 6.6
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities (1.2) (4.3)
Net Amounts of Liabilities Presented in the Balance Sheet 0.5 2.3
Foreign exchange currency contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Liabilities 1.7 6.6
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities (1.2) (4.3)
Net Amounts of Liabilities Presented in the Balance Sheet $ 0.5 $ 2.3