Stock-Based Compensation and Equity - Reclassifications Out of Accumulated Other Comprehensive Loss Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	$ 6,773,076	$ 7,017,729	$ 6,948,173	$ 6,830,055
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(8,847)	671	(4,424)	(284)
Interest expense	52,182	59,719	104,722	121,032
Other Comprehensive Income (Loss)	4,405	(8,134)	(34,946)	(5,821)
Ending equity balance	6,802,455	6,990,794	6,802,455	6,990,794
AOCI Including Portion Attributable to Noncontrolling Interest
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	8,771	(6,276)	(27,035)	(508)
Amounts reclassified from accumulated other comprehensive loss to:
Total	(4,366)	(1,858)	(7,911)	(5,313)
Other Comprehensive Income (Loss)	4,405	(8,134)	(34,946)	(5,821)
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)	(4,834)	(3,405)	(8,617)	(6,927)
Interest expense	468	1,547	706	1,614
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	(5,076)	(1,548)	11,318	3,856
Amounts reclassified from accumulated other comprehensive loss to:
Total	(4,366)	(1,858)	(7,911)	(5,313)
Other Comprehensive Income (Loss)	(9,442)	(3,406)	3,407	(1,457)
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)	(4,834)	(3,405)	(8,617)	(6,927)
Interest expense	468	1,547	706	1,614
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive income (loss) before reclassifications	13,847	(4,187)	(38,353)	(4,360)
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0	0	0
Other Comprehensive Income (Loss)	13,847	(4,187)	(38,353)	(4,360)
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	(541)	0	(4)
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0	0	0
Other Comprehensive Income (Loss)	0	(541)	0	(4)
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	(295,018)	(252,683)	(255,667)	(254,996)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(290,613)	(260,817)	(290,613)	(260,817)
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	25,897	16,051	13,048	14,102
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	16,455	12,645	16,455	12,645
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	(320,915)	(269,264)	(268,715)	(269,091)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(307,068)	(273,451)	(307,068)	(273,451)
Gains and (Losses) on Investments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	0	530	0	(7)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	$ 0	$ (11)	$ 0	$ (11)