Equity Compensation - Summary of ESPP Activity (Details) - ESPP - 1998 Employee Qualified Stock Purchase Plan - $ / shares shares in Thousands	3 Months Ended
Apr. 30, 2022	Apr. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued shares (in shares)	377	490
Average price of issued shares (in usd per share)	$ 173.83	$ 128.02
Weighted average grant date fair value of shares granted under the ESPP (in usd per share)	$ 69.19	$ 91.17

Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued, Average Price

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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