Taxes on Earnings - Uncertain Tax Positions (Details) $ in Millions		3 Months Ended	12 Months Ended
	Nov. 21, 2023 USD ($)	Jan. 31, 2022 USD ($)	Oct. 31, 2023 USD ($) country	Oct. 31, 2022 USD ($)	Oct. 31, 2021 USD ($)
Reconciliation of unrecognized tax benefits
Unrecognized Tax Benefits, Beginning Balance		$ 2,131	$ 674	$ 2,131	$ 2,159
Increases:
For current year's tax positions			67	81	24
For prior years' tax positions			20	41	64
Decreases:
For prior years' tax positions			(2)	(48)	(31)
Statute of limitations expiration			(4)	(12)	(44)
Settlements with taxing authorities		$ (1,500)	(83)	(1,491)	(15)
Settlements related to joint and several positions indemnified by HP Inc.			0	(28)	(26)
Unrecognized Tax Benefits, Ending Balance			672	674	2,131
Unrecognized tax benefits that would affect effective tax rate if realized			354	386	688
Income tax expense (interest) and penalties from uncertain tax positions			(25)	(55)	$ 17
Accrued income tax for interest and penalties			$ 56	$ 81
Number of other countries in which HPE is subject to income taxes | country			85
Likelihood of conclusion period for certain federal, foreign and state tax issues			12 months
Undistributed earnings from non-U.S. operations			$ 9,400
Subsequent Event
Decreases:
Income Tax Examination, Estimate of Possible Loss	$ 904