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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Statement [Abstract]      
Revenue $ 2,501.6 $ 2,324.9 $ 2,157.9
Cost of revenue [1],[2] 478.5 444.2 444.2
Gross profit 2,023.1 1,880.7 1,713.7
Operating expenses      
Research and development [1],[2] 936.5 891.9 755.9
Sales and marketing [1],[2] 466.0 409.4 427.5
General and administrative [1],[2] 237.1 222.9 224.6
Net (gain) loss on real estate assets [1],[2],[3],[4] (155.2) 175.2 31.3
Total operating expenses [1],[2] 1,484.4 1,699.4 1,439.3
Income from operations 538.7 181.3 274.4
Interest income (expense), net 19.4 3.3 (5.2)
Other (loss) income, net [3] (3.7) 8.1 30.1
Income before income taxes 554.4 192.7 299.3
(Provision for) benefit from income taxes [5] (100.8) 360.5 36.5
Net income $ 453.6 $ 553.2 $ 335.8
Basic net income per share (in dollars per share) $ 1.33 $ 1.53 $ 0.87
Diluted net income per share (in dollars per share) $ 1.31 $ 1.52 $ 0.85
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares) 341.2 361.2 388.0
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares) 345.6 363.3 395.8
[1] Includes expenses related to the Company's reduction in workforce such as severance, benefits and other related items during the year ended December 31, 2023. See Note 1, "Description of the Business and Summary of Significant Accounting Policies - Reduction in Workforce" for additional information.
[2] Includes stock-based compensation as follows:
Year Ended
December 31,
202320222021
Cost of revenue$23.3 $24.7 $23.2 
Research and development(6)
237.6 232.3 190.1 
Sales and marketing22.0 22.4 25.0 
General and administrative55.1 51.3 48.8 
Total stock-based compensation$338.0 $330.7 $287.1 
[3] For the year ended December 31, 2021, a $13.6 million gain related to the partial termination of the Company's lease for its San Francisco, California corporate headquarters was reclassified from other (loss) income, net to net (gain) loss on real estate assets to conform with current period presentation.
[4] Includes a one-time gain of $158.8 million related to the partial termination of the Company's lease for its San Francisco, California corporate headquarters for the year ended December 31, 2023 and impairment charges related to real estate assets for the years ended December 31, 2023, 2022 and 2021.
[5] Results of Operations for the year ended December 31, 2022 includes a one-time benefit from income taxes of $420.2 million due to the release of a valuation allowance on the U.S. federal and certain state deferred tax assets. Results of Operations for the year ended December 31, 2021 includes a one-time benefit from income taxes of $38.1 million from the release of a valuation allowance on the Irish deferred tax assets.