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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Summary of Share-Based Compensation Expense | Total share-based compensation expense related to the Company's RSUs, stock grant awards and ESPP were recorded within the Consolidated Statements of Operations and Comprehensive Income as follows (in millions):
|  | Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018
Cost of revenue |  | $ | 11.5 |  |  | $ | 10.6 |  |  | $ | 7.0 |
Research and development |  | 18.2 |  |  | 17.0 |  |  | 14.3 |
Selling and marketing |  | 12.9 |  |  | 14.8 |  |  | 14.1 |
General and administrative |  | 25.1 |  |  | 37.0 |  |  | 42.9 |
Share-based compensation expense |  | 67.7 |  |  | 79.4 |  |  | 78.3 |
Income tax benefit |  | (14.2) |  |  | (16.7) |  |  | (16.4) |
Share-based compensation expense, net of taxes |  | $ | 53.5 |  |  | $ | 62.7 |  |  | $ | 61.9 |
Summary of Restricted Stock Units Transactions | A roll forward of the beginning to ending balance of RSUs outstanding as of December 31, 2020 is as follows (number of shares in millions):
|  | Number of Shares |  | Weighted-Average Grant Date Fair Value
Nonvested shares of RSUs at December 31, 2019 |  | 8.9 |  |  | $ | 20.84 |
Granted |  | 6.5 |  |  | 19.50 |
Released |  | (3.3) |  |  | 18.57 |
Canceled |  | (0.8) |  |  | 20.86 |
Nonvested shares of RSUs at December 31, 2020 |  | 11.3 |  |  | 20.73 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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