Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ 16,850,829	$ 16,691,017	$ 16,881,572	[1]	$ 16,936,527	$ 17,066,337	$ 16,506,627
Foreign currency translation
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	(571,391)		(621,792)
Derivative and financial instruments designated as hedges
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	443,443		473,288
Total accumulated other comprehensive income (loss)
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ (127,948)	$ (128,136)	$ (148,504)		$ (116,856)	$ (96,213)	$ (112,157)

[1] Note: The consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.