Overview and Basis of Presentation (Retrospective Combination of Historical Financial Statements) (Details) - Pivotal - USD ($) $ in Millions	3 Months Ended
Jul. 31, 2020	Jan. 31, 2020
Business Acquisition [Line Items]
Accrual for amounts owed to dissenting shareholders		$ 155
Payments to dissenting stockholders	$ 91

Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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