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Revenue Recognition, Contracts with Customers, Contract Asset and Liability Balances (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2018 | Apr. 30, 2018
Revenue Recognition, Contracts with Customers [Abstract] |  |  |  |
Contract asset balance |  | $ 0 |  |
Balances from contracts with customers [Abstract] |  |  |  |
Accounts receivable, net |  | 272,143 | [1] | $ 212,377
Contract liabilities (Deferred revenue) |  | 392,309 | [1] | 486,353
Contract liabilities (included in Other Long-Term Liabilities) |  | 14,844 |  |
Increase/(decrease) [Abstract] |  |  |  |
Sales return reserve recorded in contract liability |  | 28,200 |  |
Revenue recognized from beginning contract liability |  | 196,300 |  | 0
Balances without Adoption of Topic 606 [Member] | ASU 2014-09 [Member] |  |  |  |
Balances from contracts with customers [Abstract] |  |  |  |
Accounts receivable, net | [1],[2] |  |  | 212,377
Contract liabilities (Deferred revenue) | [1],[2] |  |  | 486,353
Contract liabilities (included in Other Long-Term Liabilities) | [2] |  |  | 0
Effect of Change Higher/(Lower) [Member] | ASU 2014-09 [Member] |  |  |  |
Balances from contracts with customers [Abstract] |  |  |  |
Accounts receivable, net | [3] |  |  | 93,349
Contract liabilities (Deferred revenue) | [3] |  |  | $ 89,364
Increase/(decrease) [Abstract] |  |  |  |
Accounts receivable, net | [1] | 59,766 |  |
Contract liabilities (Deferred revenue) | [1] | (94,044) |  |
Contract liabilities (included in Other Long-Term Liabilities) |  | $ 14,844 |  |
[1] | Due to the adoption of the new revenue standard, the sales return reserve as of July 31, 2018 of $28.2 million is recorded in Contract Liability (Deferred Revenue). In prior periods, it was recorded in Accounts Receivable, Net on the Condensed Consolidated Statement of Financial Position.
[2] | As noted above, prior period amounts have not been adjusted under the modified retrospective method.
[3] | The adoption of the new revenue standard resulted in the discontinuance of the historical practice of presenting accounts receivable and deferred revenue balances on a net basis for some of our subscription licensing agreements where we have invoiced a customer in advance of the related revenue being recognized and payment has not yet been received. As of April 30, 2018, the amounts that were netted down from accounts receivable and deferred revenue were $59.5 million.

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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