Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Recorded to Income (Loss) (Parenthetical) (Detail)

v3.5.0.2
Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Recorded to Income (Loss) (Parenthetical) (Detail) - Derivatives designated as hedging instruments [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
Benefit related to hedge ineffectiveness $ 0.6 $ 0.3
Expense related to amounts excluded from assessment of hedge effectiveness recognized in income (loss) $ 0.1 $ 0.2