Segment and Geographic Information - Activity Related to Net Revenue and Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total net revenue	$ 2,330,063	$ 1,944,829
Adjusted EBITDA	(127,277)	(102,218)
Less: reconciling items	(158,588)	(98,171)
Net loss	(285,865)	(200,389)
Depreciation and amortization	66,843	39,583
Equity-based compensation and related taxes	63,992	51,833
Interest expense, net	22,218	9,238
Other expense (income), net	246	(3,078)
Provision for income taxes, net	1,333	595
Other	3,956	0
Less: reconciling items	158,588	98,171
U.S.
Segment Reporting Information [Line Items]
Total net revenue	1,974,983	1,657,698
Adjusted EBITDA	(45,095)	(27,782)
International
Segment Reporting Information [Line Items]
Total net revenue	355,080	287,131
Adjusted EBITDA	$ (82,182)	$ (74,436)