Stock-Based Compensation and Equity - Reclassifications Out of Accumulated Other Comprehensive Loss Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	$ 6,802,455	$ 6,990,794	$ 6,948,173	$ 6,830,055
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(45,113)	12,402	(49,537)	12,118
Interest expense	52,537	58,626	157,259	179,658
Other Comprehensive Income (Loss)	17,496	(24,158)	(17,450)	(29,979)
Ending equity balance	6,889,369	6,964,422	6,889,369	6,964,422
AOCI Including Portion Attributable to Noncontrolling Interest
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	18,612	(21,078)	(8,423)	(21,586)
Amounts reclassified from accumulated other comprehensive loss to:
Total	(1,116)	(3,080)	(9,027)	(8,393)
Other Comprehensive Income (Loss)	17,496	(24,158)	(17,450)	(29,979)
AOCI Including Portion Attributable to Noncontrolling Interest | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(1,664)	(3,512)	(10,281)	(10,439)
Interest expense	548	432	1,254	2,046
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	(15,558)	16,323	(4,240)	20,179
Amounts reclassified from accumulated other comprehensive loss to:
Total	(1,116)	(3,080)	(9,027)	(8,393)
Other Comprehensive Income (Loss)	(16,674)	13,243	(13,267)	11,786
Gains and (Losses) on Derivative Instruments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(1,664)	(3,512)	(10,281)	(10,439)
Interest expense	548	432	1,254	2,046
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	34,170	(37,412)	(4,183)	(41,772)
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0	0	0
Other Comprehensive Income (Loss)	34,170	(37,412)	(4,183)	(41,772)
Foreign Currency Translation Adjustments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	0	0	0	0
Interest expense	0	0	0	0
Gains and (Losses) on Investments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	0	11	0	7
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0	0	0
Other Comprehensive Income (Loss)	0	11	0	7
Gains and (Losses) on Investments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	0	0	0	0
Interest expense	0	0	0	0
Accumulated Other Comprehensive Income (Loss)
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	(290,613)	(260,817)	(255,667)	(254,996)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(273,124)	(284,975)	(273,124)	(284,975)
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	16,455	12,645	13,048	14,102
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(226)	25,888	(226)	25,888
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	(307,068)	(273,451)	(268,715)	(269,091)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(272,898)	(310,863)	(272,898)	(310,863)
Gains and (Losses) on Investments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	0	(11)	0	(7)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	0	$ 0	0	$ 0
AOCI Attributable to Noncontrolling Interest
Amounts reclassified from accumulated other comprehensive loss to:
Net current period other comprehensive income attributable to noncontrolling interests	(7)		(7)
Gains and (Losses) on Derivative Instruments
Amounts reclassified from accumulated other comprehensive loss to:
Net current period other comprehensive income attributable to noncontrolling interests	(7)		(7)
Foreign Currency Translation Adjustments
Amounts reclassified from accumulated other comprehensive loss to:
Net current period other comprehensive income attributable to noncontrolling interests	0		0
Gains and (Losses) on Investments
Amounts reclassified from accumulated other comprehensive loss to:
Net current period other comprehensive income attributable to noncontrolling interests	$ 0		$ 0