Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 1,893.0	$ (352.0)	$ (4,585.0)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Depreciation and amortization	81.0	138.0	126.0
Bad debt expense	49.0	27.3	107.7
Stock-based compensation expense	930.0	899.0	3,003.0
Deferred income taxes	(1.0)	11.0	(20.0)
Impairment of investments	0.0	3.0	82.0
(Gain) loss on investments, net	(2.0)	(8.0)	31.0
Change in fair value of warrant liability	0.0	292.0	869.0
Foreign exchange (gain) loss	62.0	24.0	(53.0)
Impairment of long-lived assets	91.0	113.0	36.0
Loss from extinguishment of debt	0.0	377.0	0.0
Other, net	8.0	28.0	58.0
Changes in operating assets and liabilities:
Prepaids and other assets	(226.0)	(54.0)	(4.0)
Operating lease right-of-use assets	41.0	25.0	(33.0)
Accounts payable	20.0	40.0	(73.0)
Accrued expenses and other liabilities	273.0	288.0	(79.0)
Operating lease liabilities	(69.0)	(34.0)	61.0
Unearned fees	280.0	496.0	(267.0)
Net cash provided by (used in) operating activities	3,430.0	2,313.0	(740.0)
Cash flows from investing activities:
Purchases of property and equipment	(25.0)	(25.0)	(37.0)
Purchases of marketable securities	(4,072.0)	(4,938.0)	(3,033.0)
Sales of marketable securities	909.0	1,584.0	1,348.0
Maturities of marketable securities	3,162.0	2,027.0	1,810.0
Other investing activities, net	(2.0)	0.0	(8.0)
Net cash provided by (used in) investing activities	(28.0)	(1,352.0)	80.0
Cash flows from financing activities:
Proceeds from issuance of common stock upon initial public offering, net of underwriting discounts and offering costs	0.0	0.0	3,651.0
Taxes paid related to net share settlement of equity awards	(607.0)	(177.0)	(1,527.0)
Proceeds from exercise of stock options	40.0	138.0	15.0
Proceeds from the issuance of common stock under employee stock purchase plan	48.0	51.0	0.0
Repurchases of common stock	(1,500.0)	0.0	0.0
Principal repayment of long-term debt	0.0	(1,995.0)	(5.0)
Prepayment penalty on long-term debt	0.0	(213.0)	0.0
Proceeds from issuance of long-term debt and warrants, net of issuance costs	0.0	0.0	1,929.0
Proceeds from issuance of convertible senior notes, net of issuance costs	0.0	1,979.0	0.0
Purchases of capped calls related to convertible senior notes	0.0	(100.0)	0.0
Change in funds payable and amounts payable to customers	1,330.0	1,625.0	(1,024.0)
Other financing activities, net	0.0	0.0	12.0
Net cash provided by (used in) financing activities	(689.0)	1,308.0	3,051.0
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(337.0)	(210.0)	134.0
Net increase in cash, cash equivalents, and restricted cash	2,376.0	2,059.0	2,525.0
Cash, cash equivalents, and restricted cash, beginning of year	9,727.0	7,668.0	5,143.0
Cash, cash equivalents, and restricted cash, end of year	12,103.0	9,727.0	7,668.0
Supplemental disclosures of cash flow information:
Cash paid for income taxes, net of refunds	68.0	17.0	15.0
Cash paid for interest	$ 8.0	$ 50.0	$ 130.0