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v3.20.1

Acquisitions (Narrative) (Details) |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 23, 2019 USD ($) shares | Dec. 19, 2018 USD ($) shares | Jul. 03, 2018 USD ($) shares | Jan. 31, 2020 USD ($) | Jan. 31, 2019 USD ($) business_combination | Jan. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred, equity interests |  |  | $ 44,800,000 | $ 0 | $ 44,800,000 | $ 0 |
Goodwill |  |  |  | 0 |  |  |
Number of businesses acquired | business_combination |  |  |  |  | 3 |  |
Term Loan |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Face amount |  |  |  | $ 450,000,000.0 |  |  | $ 500,000,000.0
BuildingConnected, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred | $ 253,200,000 |  |  |  |  |  |
Payments to acquire businesses | 248,100,000 |  |  |  |  |  |
Consideration transferred, equity interests | $ 5,100,000 |  |  |  |  |  |
Consideration transferred, number of options (in shares) | shares | 116,279 |  |  |  |  |  |
PlanGrid |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred |  | $ 777,600,000 |  |  |  |  |
Payments to acquire businesses |  | 772,400,000 |  |  |  |  |
Consideration transferred, equity interests |  | $ 5,200,000 |  |  |  |  |
Consideration transferred, number of options (in shares) | shares |  | 602,051 |  |  |  |  |
PlanGrid | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred, number of restricted stock units (in shares) | shares |  | 41,069 |  |  |  |  |
Assemble Systems Inc |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to acquire businesses |  |  | 38,200,000 |  |  |  |
Consideration |  |  | $ 93,600,000 |  |  |  |
Stock issued (shares) | shares |  |  | 340,769 |  |  |  |
Equity interest prior to acquisition |  |  | $ 10,600,000 |  |  |  |
Ownership percentage prior to acquisition |  |  | 14.00% |  |  |  |
Step acquisition remeasurement gain |  |  | $ 4,600,000 |  |  |  |

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