Derivatives and Hedging Activities - Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income	$ (97,058)	$ (37,857)	$ 47,888	$ 38,983
Amount of gain or (loss) excluded from effectiveness testing included in income:	5,459	4,928	10,548	9,091
Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	(22,639)	(4,004)	(19,528)	6,961
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	10,150	8,939	20,537	13,471
Amount of gain or (loss) excluded from effectiveness testing included in income:	(503)	(17)	(1,024)	71
Foreign Currency Debt | Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income	(85,215)	(34,309)	13,887	29,606
Foreign currency forward and option contracts (included component) | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	(22,347)	(2,599)	5,678	8,366
Foreign currency option contracts (excluded component) | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income	358	(1,405)	1,676	(1,405)
Foreign currency option contracts (excluded component) | Cash flow hedges | Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) excluded from effectiveness testing included in income:	(503)	(17)	(1,024)	(17)
Interest rate locks | Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	(650)	0	(26,882)	0
Interest rate locks | Cash flow hedges | Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	90	0	258	0
Foreign currency forward contracts | Cash flow hedges | Costs and operating expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	(10,498)	(9,745)	(21,498)	(15,074)
Foreign currency forward contracts | Cash flow hedges | Other income (expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) excluded from effectiveness testing included in income:	0	0	0	88
Foreign currency forward contracts | Cash flow hedges | Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	20,558	18,684	41,777	28,545
Cross-currency interest rate swap | Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income	(10,333)	(9,689)	3,807	5,826
Amount of gain or (loss) recognized in accumulated other comprehensive income	(1,510)	6,141	30,194	3,551
Cross-currency interest rate swap | Net investment hedges | Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) excluded from effectiveness testing included in income:	$ 5,459	$ 4,928	$ 10,548	$ 9,091