Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	$ 5,037,821	$ 4,478,114	$ 10,154,507	$ 8,684,974
Total segment adjusted EBITDA	66,172	(122,147)	(24,700)	(255,113)
Reconciling items:
Equity-based compensation	(72,916)	(50,346)	(128,509)	(137,312)
Interest expense	(6,143)	(5,848)	(13,511)	(30,671)
Interest income	7,364	1,907	10,898	2,847
Other (expense) income, net	(9,229)	373	(8,739)	(3,453)
Loss before income taxes	(75,151)	(518,504)	(284,200)	(813,529)
Operating segments | Product Commerce
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	4,877,531	4,332,725	9,813,584	8,430,376
Total segment adjusted EBITDA	97,840	(47,873)	100,717	(117,162)
Operating segments | Developing Offerings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total net revenues	160,290	145,389	340,923	254,598
Total segment adjusted EBITDA	(31,668)	(74,274)	(125,417)	(137,951)
Segment reconciling items
Reconciling items:
Depreciation and amortization	(60,399)	(46,942)	(119,639)	(94,326)
Equity-based compensation	(72,916)	(50,346)	(128,509)	(137,312)
Interest expense	(6,143)	(5,848)	(13,511)	(30,671)
Interest income	7,364	1,907	10,898	2,847
Other (expense) income, net	(9,229)	373	(8,739)	(3,453)
Fulfillment center fire losses	$ 0	$ (295,501)	$ 0	$ (295,501)