Guarantees, Indemnifications and Warranties (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Changes in aggregated product warranty liabilities
Balance at beginning of year	$ 523	$ 571
Accruals for warranties issued	376	373
Adjustments related to pre-existing warranties (including changes in estimates)	1	(16)
Divested as part of the H3C transaction	(23)	0
Settlements made (in cash or in kind)	(380)	(405)
Balance at end of year	497	523
HP Inc.
Tax Matters Agreements
Certain income tax receivable	1,300
HP Inc. | Cross-Indemnifications
General Cross indemnifications
Receivables from HP Inc.	232	56
Payable to HP Inc.	$ 41	$ 38