Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Recorded to Income (Parenthetical) (Detail) - Derivatives designated as hedging instruments [Member]
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]  
Benefit related to hedge ineffectiveness $ 1.3
Expense related to amounts excluded from assessment of hedge effectiveness recognized in income (loss) $ 0.9