Financial Instruments - Derivative Instruments Designated as Cash Flow and Net Investment Hedging Instruments (Parenthetical) (Detail) (Derivatives in Cash Flow Hedging Relationships [Member], USD $)	9 Months Ended
	Sep. 30, 2014
Cross currency swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instrument maturity period (years)	10 years
Interest rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Senior Notes	$ 300,000,000