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Equity Compensation - Narrative (Details) $ / shares in Units, $ in Millions |  |  |  |  | 3 Months Ended | 12 Months Ended | 121 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
May 11, 2021 USD ($) | Mar. 31, 2021 USD ($) shares | Nov. 23, 2020 USD ($) shares | Mar. 12, 2015 shares | Jan. 31, 2021 USD ($) shares | Jan. 31, 2022 USD ($) period Plan trading_day $ / shares shares | Jan. 31, 2021 USD ($) $ / shares shares | Jan. 31, 2020 USD ($) $ / shares | Jan. 31, 2022 USD ($) shares
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Number of active stock plans | Plan |  |  |  |  |  | 4 |  |  |
Number of additional share authorized (in shares) |  |  |  |  |  |  |  |  | 36,100,000
Shares available for future issuance (in shares) |  |  |  |  |  | 13,300,000 |  |  | 13,300,000
Liability classified awards, settled | $ |  |  |  |  |  | $ 2.7 | $ 28.7 | $ 23.5 |
Market capitalization level of peer group | $ |  |  |  |  |  | 2,000.0 |  |  | $ 2,000.0
Fair value of common stock issued related to business combination | $ |  |  |  |  |  | $ 6.1 | 37.9 | 0.0 |
Consecutive trading days | trading_day |  |  |  |  |  | 90 |  |  |
Stock-based compensation expense related to stock awards and Employee Qualified Stock Purchase Plan ("ESPP") purchases | $ |  |  |  |  |  | $ 558.5 | 399.8 | 362.4 |
Number of exercise period | period |  |  |  |  |  | 4 |  |  |
Term of exercise period |  |  |  |  |  | 6 months |  |  |
Term of offering period |  |  |  |  |  | 24 months |  |  |
Spacemaker |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ |  |  | $ 37.9 |  |  |  |  |  |
Shares issued in period (in shares) |  |  | 73,632 |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares (in shares) |  |  | 147,264 |  |  |  |  |  |
Stock-based compensation expense related to stock awards and Employee Qualified Stock Purchase Plan ("ESPP") purchases | $ |  |  |  |  | $ 2.0 |  |  |  |
Innovyze |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ |  | $ 2.6 |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares (in shares) |  | 9,277 |  |  |  |  |  |  |
Upchain |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ | $ 13.1 |  |  |  |  | $ 13.1 |  |  |
Business acquisition, equity interest issued or issuable, number of shares (in shares) |  |  |  |  |  | 48,000 |  |  |
Stock-based compensation expense related to stock awards and Employee Qualified Stock Purchase Plan ("ESPP") purchases | $ |  |  |  |  |  | $ 3.1 |  |  |
Upchain | Year One |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage (up to percentage) | 40.00% |  |  |  |  |  |  |  |
Upchain | Year Two |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage (up to percentage) | 60.00% |  |  |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ |  |  |  |  |  | $ 10.6 |  |  |
Business acquisition, equity interest issued or issuable, number of shares (in shares) |  |  |  |  |  | 39,000 |  |  |
Common Stock |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Liability classified awards, settled | $ |  |  |  |  |  | $ 2.7 | 28.7 | 23.5 |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Restricted stock granted (in shares) |  |  |  |  |  | 2,000,000 |  |  |
Share based compensation expense, restricted stock units | $ |  |  |  |  |  | $ 425.1 | $ 308.9 | $ 274.5 |
Total compensation cost related to non-vested awards not yet recognized | $ |  |  |  |  |  | $ 672.8 |  |  | $ 672.8
Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition |  |  |  |  |  | 1 year 7 months 6 days |  |  |
Number of awards granted but unreleased |  |  |  |  |  | 3,600,000 |  |  | 3,600,000
Restricted Stock Units (RSUs) | Maximum |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 3 years |  |  |
Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  |  |  | $ 288.13 | $ 224.20 | $ 156.24 |
Fair value of units vested in period | $ |  |  |  |  |  | $ 619.8 | $ 503.4 | $ 361.0 |
Restricted stock granted (in shares) |  |  |  |  |  | 2,294,100 |  |  |
Number of awards granted but unreleased |  |  |  |  | 4,503,900 | 4,032,700 | 4,503,900 |  | 4,032,700
Performance Stock Unit |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 3 years |  |  |
Restricted stock granted (in shares) |  |  |  |  |  | 200,000 |  |  |
Share based compensation expense, restricted stock units | $ |  |  |  |  |  | $ 68.2 | $ 30.7 | 27.1 |
Total compensation cost related to non-vested awards not yet recognized | $ |  |  |  |  |  | $ 10.4 |  |  | $ 10.4
Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition |  |  |  |  |  | 7 months 6 days |  |  |
Number of awards granted but unreleased |  |  |  |  |  | 400,000 |  |  | 400,000
Performance Stock Unit | Year One |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage (up to percentage) |  |  |  |  |  | 33.33% |  |  |
Performance Stock Unit | Year Two |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage (up to percentage) |  |  |  |  |  | 33.33% |  |  |
Performance Stock Unit | Year Three |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage (up to percentage) |  |  |  |  |  | 33.33% |  |  |
Performance Stock Unit | Management |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 1 year |  |  |
Restricted stock granted (in shares) |  |  |  |  |  | 100,000 |  |  |
Common Stock |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares of common stock reserved for issuance (in shares) |  |  |  |  |  | 9,000 |  |  | 9,000
Shares issued in period (in shares) |  |  |  |  |  | 8,300 |  |  |
Value of shares issued | $ |  |  |  |  |  | $ 2.7 |  |  |
Stock-based compensation expense related to stock awards and Employee Qualified Stock Purchase Plan ("ESPP") purchases | $ |  |  |  |  |  | $ 16.5 | 2.4 |  |
Common Stock | Spacemaker |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ |  |  |  |  |  |  | $ 4.9 |  |
Restricted Stock |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 2 years |  |  |
Restricted Stock | Spacemaker |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 3 years |  |
Shares issued in period (in shares) |  |  |  |  |  |  | 73,632 |  |
Restricted Stock | Innovyze |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares issued in period (in shares) |  | 9,277 |  |  |  |  | 9,277 |  |
Restricted Stock | Other |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Fair value of common stock issued related to business combination | $ |  |  |  |  |  | $ 3.5 |  |  |
Shares issued in period (in shares) |  |  |  |  |  | 12,782 |  |  |
Employee Stock Plan 2012 |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares of common stock reserved for issuance (in shares) |  |  |  |  |  | 57,300,000 |  |  | 57,300,000
Restricted stock award, net of forfeitures (in shares) |  |  |  |  |  | 51,300,000 |  |  |
Shares forfeited (in shares) |  |  |  |  |  | 6,000,000 |  |  |
Shares granted to shares issued (in shares) |  |  |  |  |  | 1.79 |  |  |
Shares available for future issuance (in shares) |  |  |  |  |  | 6,900,000 |  |  | 6,900,000
Employee Stock Plan 2012 | Stock Options and Restricted Stock |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Grants in period, net of forfeitures (in shares) |  |  |  |  |  | 59,100,000 |  |  |
Share based payment award options expiration term (in years) |  |  |  |  |  | 10 years |  |  |
Vesting period |  |  |  |  |  | 3 years |  |  |
Directors stock plan 2012 |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares of common stock reserved for issuance (in shares) |  |  |  |  |  | 1,700,000 |  |  | 1,700,000
Shares granted to shares issued (in shares) |  |  |  |  |  | 2.11 |  |  |
Shares available for future issuance (in shares) |  |  |  |  |  | 700,000 |  |  | 700,000
Reduction of shares reserved for issuance (in shares) |  |  |  | 900,000 |  |  |  |  |
Directors stock plan 2012 | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Grants in period, net of forfeitures (in shares) |  |  |  |  |  | 1,000,000 |  |  |
2012 Outside Directors' Plan | Minimum |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 1 year |  |  |
2012 Outside Directors' Plan | Maximum |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  | 3 years |  |  |
PlanGrid 2012 Plan |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Share based payment award options expiration term (in years) |  |  |  |  |  | 10 years |  |  |
Vesting period |  |  |  |  |  | 4 years |  |  |
Options outstanding (in shares) |  |  |  |  |  | 67,000 |  |  | 67,000
BuildingConnected 2012 Plan |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Share based payment award options expiration term (in years) |  |  |  |  |  | 10 years |  |  |
Vesting period |  |  |  |  |  | 4 years |  |  |
Options outstanding (in shares) |  |  |  |  |  | 14,000 |  |  | 14,000
ESP Plan |  |  |  |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares available for future issuance (in shares) |  |  |  |  |  | 5,600,000 |  |  | 5,600,000
Percentage of compensation that eligible employees can use to purchase common stock, maximum |  |  |  |  |  | 15.00% |  |  |
Percentage of fair market value eligible employees can purchase common stock, minimum |  |  |  |  |  | 85.00% |  |  |
Number of exercise period | period |  |  |  |  |  | 4 |  |  |
Term of exercise period |  |  |  |  |  | 6 months |  |  |
Term of offering period |  |  |  |  |  | 24 months |  |  |
Employee service share based compensation recognized compensation costs on nonvested restricted shares | $ |  |  |  |  |  | $ 37.1 | $ 40.1 | $ 33.3 |

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