Derivatives - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Derivative [Line Items]
Number of interest rate swap contracts			1
Notional amount of interest rate derivatives	$ 2,039,415,000		$ 2,039,415,000		$ 810,703,000
Interest Rate Risk Management [Member]
Derivative [Line Items]
Ineffectiveness recognized
Maturity Date			Sep. 30, 2013
Notional amount of interest rate derivatives					19,700,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Forward contracts, maturity period			June 2014		October 2013
Forward contracts maturing within 12 months			533,800,000		330,900,000
Fair value of foreign currency derivatives not designated as hedges, assets	3,000,000		3,000,000		1,200,000
Minimum [Member]
Derivative [Line Items]
Foreign exchange contracts maturity period, years			2 years
Maximum [Member]
Derivative [Line Items]
Foreign exchange contracts maturity period, years			5 years
Cash Flow Hedging [Member]
Derivative [Line Items]
Fair value of forward contracts	1,505,600,000		1,505,600,000		479,800,000
Forward contracts, maturity period			June 2018		June 2014
Ineffectiveness recognized	900,000	0	1,100,000	0
Fair value of derivatives contracts			27,400,000		11,600,000
Amount expected to be reclassified from AOCI to earnings within the next 12 months			13,200,000
Recognized net gains related to the change in forward points			$ 600,000	$ 1,400,000