EMC MERGER TRANSACTION, OTHER TRANSACTIONS AND BASIS OF PRESENTATION - SecureWorks Initial Public Offering (Details)	Oct. 28, 2016
SecureWorks
Subsidiary, Sale of Stock [Line Items]
Ownership percent in non-controlling interest	87.50%

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.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration