v3.20.1

Business combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 30, 2019 | Jan. 31, 2020 | Jan. 31, 2019
Business Acquisition [Line Items] |  |  |
Acquisition costs |  | $ 40,810 | $ 2,121
WageWorks, Inc. |  |  |
Business Combinations [Abstract] |  |  |
Merger related costs, price per share | $ 51.35 |  |
Business Acquisition [Line Items] |  |  |
Merger related costs, price per share | $ 51.35 |  |
Aggregate fair value of WageWorks stock acquired | $ 2,000,000 | 2,122,100 |
Cash paid | 816,900 |  |
Borrowing pursuant to term loan facility | 1,220,000 |  |
Goodwill |  | 1,330,000 |
Acquisition costs |  | 40,800 |
Contribution of revenue |  | $ 184,700 |
WageWorks, Inc. | Term Loan Facility | Line of Credit |  |  |
Business Acquisition [Line Items] |  |  |
Cash paid | $ 30,500 |  |

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