Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss	$ (2,602,241)	$ (911,335)	$ (688,301)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	108,429	18,752	2,611
Stock-based compensation	1,599,311	8,577	9,546
Amortization of premium on marketable securities	597	473	948
Accretion of discount on marketable securities	(39,285)	(23,605)	(5,542)
Loss on disposal of assets	36,541	0	0
Other	(875)	989	0
Changes in operating assets and liabilities
Prepaid expenses and other assets	(119,453)	(75,640)	(111,772)
Operating lease right-of-use assets	108,600
Accounts payable	5,067	(40,811)	21,384
Insurance reserves	568,190	433,735	244,587
Accrued and other liabilities	332,363	308,192	133,013
Lease liabilities	(102,946)
Net cash used in operating activities	(105,702)	(280,673)	(393,526)
Cash flows from investing activities
Purchases of marketable securities	(6,448,895)	(5,454,118)	(2,559,423)
Purchases of term deposits	(142,811)	0	0
Proceeds from sales of marketable securities	1,092,978	900,361	872,298
Proceeds from maturities of marketable securities	4,071,165	3,838,464	707,722
Purchases of property and equipment and scooter fleet	(178,088)	(68,668)	(7,537)
Purchases of other intangible assets	0	(2,200)	(4,486)
Cash paid for acquisitions, net of cash acquired	(12,323)	(257,591)	0
Other investing activities	7,131	0	0
Net cash used in investing activities	(1,610,843)	(1,043,752)	(991,426)
Cash flows from financing activities
Proceeds from issuance of common stock in initial public offering, net of underwriting commissions, offering costs and reimbursements	2,484,029	0	0
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	842,658	2,045,279
Proceeds from exercise of stock options and other common stock issuances	33,062	9,986	3,672
Payment of deferred offering costs	0	(406)	0
Taxes paid related to net share settlement of equity awards	(942,895)	0	0
Net cash provided by financing activities	1,574,196	852,238	2,048,951
Effect of foreign exchange on cash, cash equivalents and restricted cash and cash equivalents	328	(246)	0
Net increase (decrease) in cash, cash equivalents and restricted cash and cash equivalents	(142,021)	(472,433)	663,999
Beginning of period	706,486	1,178,919	514,920
End of period	564,465	706,486	1,178,919
Reconciliation of cash, cash equivalents and restricted cash and cash equivalents to the consolidated balance sheets
Total cash, cash equivalents and restricted cash and cash equivalents	564,465	1,178,919	1,178,919
Non-cash investing and financing activities
Purchases of property and equipment, and scooter fleet not yet settled	13,070	8,154	704
Deferred offering costs accrued, unpaid	0	1,689	0
Right of use assets acquired under operating leases	264,076
Redeemable convertible preferred stock issued as part of a business combination	0	25,340	0
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering	5,152,047	0	0
Reclassification of deferred offering costs to additional paid-in capital upon initial public offering	7,690	0	0
Decrease in goodwill from measurement period adjustments related to business combinations	$ 3,240	$ 0	$ 0