Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 225,805	$ 157,694	[1]	$ 659,563	[2]	$ 509,483	[1]
Other comprehensive income (loss):
Foreign currency translation (losses), net of tax	(180,317)	(74,058)		(148,282)		(392,889)
Net change in derivative contracts, net of tax	(6,164)			(52,538)
Net change in derivative contracts, net of tax		0				0
Total other comprehensive (loss)	(186,481)	(74,058)		(200,820)		(392,889)
Total comprehensive income	$ 39,324	$ 83,636		$ 458,743		$ 116,594

[1] Reflects reclassifications from previously disclosed amounts to conform to current presentation.

[2] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using the modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 2.