CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Net interest revenues	$ 74	$ 68	$ 129	$ 130
Total net revenues	318	565	617	1,087
Operating expenses:
Brokerage and transaction	30	38	61	79
Technology and development	244	156	510	273
Operations	86	101	177	168
Marketing	24	94	58	196
General and administrative	226	112	494	249
Total operating expenses	610	501	1,300	965
Change in fair value of convertible notes and warrant liability	0	528	0	2,020
Other income (expense), net	2	0	2	(1)
Loss before income taxes	(294)	(464)	(685)	(1,897)
Provision for income taxes	1	38	2	50
Net loss	(295)	(502)	(687)	(1,947)
Net loss attributable to common stockholders:
Basic	(295)	(502)	(687)	(1,947)
Diluted	$ (295)	$ (502)	$ (687)	$ (1,947)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.34)	$ (2.16)	$ (0.79)	$ (8.41)
Diluted (in dollars per share)	$ (0.34)	$ (2.16)	$ (0.79)	$ (8.41)
Weighted-average shares used to compute net loss per share attributable to common stockholders:
Basic (in shares)	874,873,301	232,223,019	871,343,295	231,459,227
Diluted (in shares)	874,873,301	232,223,019	871,343,295	231,459,227
Transaction-based revenues
Revenues:
Revenues	$ 202	$ 451	$ 420	$ 871
Other revenues
Revenues:
Revenues	$ 42	$ 46	$ 68	$ 86