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Equity Compensation - Stock Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2021 | Oct. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | $ 143.7 | $ 97.4 | $ 412.7 | $ 291.5
Tax benefit | (26.3) | (2.0) | (46.4) | (2.3)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax | 117.4 | 95.4 | 366.3 | 289.2
Cost of subscription and maintenance revenue |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | 5.5 | 4.5 | 18.3 | 12.3
Cost of other revenue |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | 2.3 | 1.6 | 6.5 | 4.7
Marketing and sales |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | 60.0 | 45.4 | 172.8 | 129.5
Research and development |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | 56.6 | 35.4 | 163.4 | 103.6
General and administrative |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense related to stock awards and ESPP purchases | $ 19.3 | $ 10.5 | $ 51.7 | $ 41.4

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