Taxes on Earnings - Schedule of Differences Between U.S. Federal Statutory Income Tax Rate and HP's Effective Tax Rate (Details)	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax rate from continuing operations	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit	2.20%	1.70%	1.30%
Impact of foreign earnings including GILTI and FDII, net	(0.70%)	(1.40%)	(7.90%)
Valuation allowances	(7.10%)	(7.30%)	0.30%
Uncertain tax positions and audit settlements	1.00%	3.20%	2.80%
Impact of internal reorganization	0.00%	(27.40%)	9.40%
Other, net	(1.00%)	(0.90%)	0.70%
Effective tax rate	15.40%	(11.10%)	27.60%