Effect of Non-derivative Instruments Qualifying and Designated as Hedging Instruments in Net Investment Hedges on the Consolidated Financial Statements (Detail) (Non-derivative instruments, USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI (Effective Portion)	$ 49,745	$ (64,281)	$ (4,757)	$ 37,993
Amount of Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Other income (expense) | Foreign Currency Debt
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI (Effective Portion)	49,745	(64,281)	(4,757)	37,993
Amount of Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)