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Financial Instruments and Fair Value Measurements - Summary of Changes in Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Cumulative translation adjustment $ (368,130) $ 553,972 $ (304,009)
Foreign currency translation gains (losses), net (190,590) 63,455 (135,958)
Total unrealized gains (losses) on derivative contracts, net (1,323) 22,591 (1,349)
Total change in other comprehensive income (loss) (191,913) 86,046 (137,307)
Designated As Hedging Instrument [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total derivative hedging instruments 26,457 (12,762) 55,460
Designated As Hedging Instrument [Member] | Non derivative Net Investment Hedge [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Nonderivative net investment hedges 151,083 (477,755) 112,591
Designated As Hedging Instrument [Member] | Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total derivative hedging instruments (5,815) 12,726 (551)
Designated As Hedging Instrument [Member] | Our Share of Derivatives from Unconsolidated Co-Investment Ventures [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total derivative hedging instruments $ 4,492 $ 9,865 $ (798)