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Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment [Member] | Noncontrolling Interest [Member] | Parent [Member] | Parent [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Accumulated Deficit [Member] | Accumulated Deficit [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Convertible Preferred Stock [member] Preferred Stock [Member] | Common Stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ (339.1) |  |  | $ (339.1) |  | $ 98.3 | $ (0.3) | $ (437.1) |  | $ 1,182.4 |
Beginning balance, shares at Dec. 31, 2018 |  |  |  |  |  |  |  |  |  | 224,058,550 | 104,177,280
Net loss | (388.0) |  |  | (388.0) |  |  |  | (388.0) |  |  |
Unrealized gain (loss) on investments | 0.4 |  |  | 0.4 |  |  | 0.4 |  |  |  |
Issuance of shares in connection with acquisitions | 0.1 |  |  | 0.1 |  | 0.1 |  |  |  |  |
Issuance of shares in connection with acquisitions, Shares |  |  |  |  |  |  |  |  |  |  | 40,990
Issuance of Series G convertible preferred stock, net of issuance costs |  |  |  |  |  |  |  |  |  | $ 343.3 |
Issuance of Series G convertible preferred stock, net of issuance costs, Shares |  |  |  |  |  |  |  |  |  | 22,306,800 |
Issuance of common stock upon exercise of stock options | 7.6 |  |  | 7.6 |  | 7.6 |  |  |  |  |
Issuance of common stock upon exercise of stock options, Shares |  |  |  |  |  |  |  |  |  |  | 5,075,790
Stock-based compensation | 37.4 |  |  | 37.4 |  | 37.4 |  |  |  |  |
Ending balance at Dec. 31, 2019 | (681.6) |  |  | (681.6) |  | 143.4 | 0.1 | (825.1) |  | $ 1,525.7 |
Ending balance, shares at Dec. 31, 2019 |  |  |  |  |  |  |  |  |  | 246,365,350 | 109,294,060
Net loss | (270.2) |  |  | (270.2) |  |  |  | (270.2) |  |  |
Cumulative change in accounting principle (ASU 2016-13) |  | $ (5.6) |  |  | $ (5.6) |  |  |  | $ (5.6) |  |
Unrealized gain (loss) on investments | (0.1) |  |  | (0.1) |  |  | (0.1) |  |  |  |
Issuance of shares in connection with acquisitions | 1.2 |  |  | 1.2 |  | 1.2 |  |  |  |  |
Issuance of shares in connection with acquisitions, Shares |  |  |  |  |  |  |  |  |  |  | 401,310
Conversion of Series D convertible preferred stock | 40.0 |  |  | 40.0 |  | 40.0 |  |  |  | $ (40.0) |
Conversion of Series D convertible preferred stock, Shares |  |  |  |  |  |  |  |  |  | (9,382,620) | 9,382,620
Issuance of Series G convertible preferred stock, net of issuance costs |  |  |  |  |  |  |  |  |  | $ 1.0 |
Issuance of Series G convertible preferred stock, net of issuance costs, Shares |  |  |  |  |  |  |  |  |  | 64,820 |
Issuance of common stock upon exercise of stock options | 9.6 |  |  | 9.6 |  | 9.6 |  |  |  |  |
Issuance of common stock upon exercise of stock options, Shares |  |  |  |  |  |  |  |  |  |  | 2,710,680
Early exercise of stock options |  |  |  |  |  |  |  |  |  |  | 1,183,230
Vesting of early exercised stock options | 0.6 |  |  | 0.6 |  | 0.6 |  |  |  |  |
Stock-based compensation | 43.2 |  |  | 43.2 |  | 43.2 |  |  |  |  |
Ending balance at Dec. 31, 2020 | (862.9) |  |  | (862.9) |  | 238.0 | 0.0 | (1,100.9) |  | $ 1,486.7 |
Ending balance, shares at Dec. 31, 2020 |  |  |  |  |  |  |  |  |  | 237,047,550 | 122,971,900
Net loss | (494.1) |  | $ 0.0 | (494.1) |  |  |  | (494.1) |  |  |
Acquisition related non-controlling interest | 3.8 |  | 3.8 |  |  |  |  |  |  |  |
Issuance of shares in connection with acquisitions | 10.1 |  |  | 10.1 |  | 10.1 |  |  |  |  |
Issuance of shares in connection with acquisitions, Shares |  |  |  |  |  |  |  |  |  |  | 855,740
Conversion of Series D convertible preferred stock | 67.6 |  |  | 67.6 |  | 67.6 |  |  |  | $ (67.6) |
Conversion of Series D convertible preferred stock, Shares |  |  |  |  |  |  |  |  |  | (15,920,450) | 15,920,450
Conversion of convertible preferred stock to common stock in connection with the initial public offering | 1,419.1 |  |  | 1,419.1 |  | 1,419.1 |  |  |  | $ (1,419.1) |
Conversion of convertible preferred stock to common stock in connection with the initial public offering, Shares |  |  |  |  |  |  |  |  |  | (221,127,100) | 223,033,725
Issuance of common stock in connection with the initial public offering, net of issuance costs | 438.7 |  |  | 438.7 |  | 438.7 |  |  |  |  |
Issuance of common stock in connection with the initial public offering, net of issuance costs, Shares |  |  |  |  |  |  |  |  |  |  | 26,296,438
Issuance of common stock upon exercise of stock options | $ 21.3 |  |  | 21.3 |  | 21.3 |  |  |  |  |
Issuance of common stock upon exercise of stock options, Shares | 9,318,462 |  |  |  |  |  |  |  |  |  | 9,318,012
Early exercise of stock options | 918,590 |  |  |  |  |  |  |  |  |  |
Vesting of early exercised stock options | $ 5.0 |  |  | 5.0 |  | 5.0 |  |  |  |  |
Stock-based compensation | 301.4 |  |  | 301.4 |  | 301.4 |  |  |  |  |
Issuance of common stock upon settlement of RSUs, net of taxes withheld | (62.4) |  |  | (62.4) |  | (62.4) |  |  |  |  |
Issuance of common stock upon settlement of RSUs, net of taxes withheld, Shares |  |  |  |  |  |  |  |  |  |  | 10,871,486
Ending balance at Dec. 31, 2021 | $ 847.6 |  | $ 3.8 | $ 843.8 |  | $ 2,438.8 | $ 0.0 | $ (1,595.0) |  | $ 0.0 |
Ending balance, shares at Dec. 31, 2021 |  |  |  |  |  |  |  |  |  | 0 | 409,267,751

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- Definition Amount of unrealized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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