Equity-Based Compensation (Details) shares in Millions	12 Months Ended
Apr. 30, 2020 shares
Stock Options
Stock options
Term of award	ten years
Minimum \| Stock Options
Stock options
Vesting period (in years)	3 years
Minimum \| Restricted stock units
Stock options
Vesting period (in years)	1 year
Maximum \| Stock Options
Stock options
Vesting period (in years)	4 years
Maximum \| Restricted stock units
Stock options
Vesting period (in years)	3 years
Plan
Stock options
Shares authorized	2.5
Number of shares available for grant	1.2

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Description of terms of award under share-based payment arrangement.

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