Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	$ 5,116,686	$ 4,206,860
Total segment adjusted EBITDA	(90,872)	(132,966)
Reconciling items:
Equity-based compensation	(55,593)	(86,966)
Interest expense	(7,368)	(24,823)
Interest income	3,534	940
Other income (expense), net	(490)	3,826
Loss before income taxes	(209,049)	(295,025)
Operating segments | Product Commerce
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	4,936,053	4,097,651
Total segment adjusted EBITDA	2,877	(69,289)
Operating segments | Developing Offerings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	180,633	109,209
Total segment adjusted EBITDA	(93,749)	(63,677)
Segment reconciling items
Reconciling items:
Depreciation and amortization	(59,240)	(47,384)
Equity-based compensation	(55,593)	(86,966)
Interest expense	(7,368)	(24,823)
Interest income	3,534	940
Other income (expense), net	$ 490	$ (3,826)