CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (392)	$ (1,445)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	12	4
Provision for credit losses	8	16
Share-based compensation	220	9
Change in fair value of convertible notes and warrant liability	0	1,492
Changes in operating assets and liabilities:
Segregated securities under federal and other regulations	0	135
Receivables from brokers, dealers, and clearing organizations	(36)	(51)
Receivables from users, net	1,417	(2,029)
Deposits with clearing organizations	34	(97)
Operating lease right-of-use assets	(26)	(6)
Current and non-current prepaid expenses	26	(20)
Other current and non-current assets	2	616
Accounts payable and accrued expenses	(2)	126
Payables to users	673	(56)
Securities loaned	(1,500)	110
Current and non-current operating lease liabilities	32	7
Other current and non-current liabilities	(31)	(693)
Net cash provided by (used in) operating activities	437	(1,882)
Investing activities:
Purchase of property, software, and equipment	(13)	(9)
Capitalization of internally developed software	(8)	(2)
Purchase of investments	(14)	0
Sales of investments	1	0
Net cash used in investing activities	(34)	(11)
Financing activities:
Taxes paid related to net share settlement of equity awards	(3)	0
Proceeds from issuance of convertible notes and warrants	0	3,552
Draws on credit facilities	11	1,000
Repayments on credit facilities	(11)	(1,000)
Proceeds from exercise of stock options, net of repurchases	3	6
Net cash provided by financing activities	0	3,558
Net increase in cash, cash equivalents, segregated cash and restricted cash	403	1,665
Cash, cash equivalents, segregated cash and restricted cash, beginning of the period	10,270	6,190
Cash, cash equivalents, segregated cash and restricted cash, end of the period	10,673	7,855
Cash and cash equivalents, end of the period	6,191	4,795
Segregated cash, end of the period	4,458	3,050
Restricted cash, end of the period	24	10
Cash, cash equivalents, segregated cash and restricted cash, end of the period	10,673	7,855
Supplemental disclosures:
Cash paid for interest	3	1
Cash paid for income taxes, net of refund received	$ 1	$ 3