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Transformation Programs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020	Oct. 31, 2020
Restructuring Cost and Reserve [Line Items]
Transformation costs	$ 209	$ 200	$ 520	$ 289
Current restructuring liability reported in Accrued restructuring	233		233		$ 366
Transformation Program
Restructuring Cost and Reserve [Line Items]
Current restructuring liability reported in Accrued restructuring	227		227		359
Transformation Program | Other Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Current restructuring liability reported in Accrued restructuring	32		32		24
Transformation Program | Long-Term Other Liabilities
Restructuring Cost and Reserve [Line Items]
Long-term portion of restructuring reserve, recorded in Other liabilities	200		200		$ 91
HPE Next
Restructuring Cost and Reserve [Line Items]
Transformation costs	58	$ 200	117	$ 289
HPE Next | Transformation Costs
Restructuring Cost and Reserve [Line Items]
Transformation costs	151		403
HPE Next | Non-Service Net Periodic Benefit Credit
Restructuring Cost and Reserve [Line Items]
Transformation costs	2		2
Cost optimization and prioritization plan
Restructuring Cost and Reserve [Line Items]
Transformation costs	$ 153		$ 405

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Transformation Costs

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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