Retirement and Post-Retirement Benefit Plans (Tables)

3 Months Ended

Jan. 31, 2022

Retirement Benefits [Abstract]

Schedule of Pension and Post-Retirement Benefit (Credit) Cost

The components of HP’s pension and post-retirement benefit (credit) cost recognized in the Consolidated Condensed Statements of Earnings were as follows:

	Three months ended January 31
	U.S. Defined Benefit Plans				Non-U.S. Defined Benefit Plans				Post-Retirement Benefit Plans
	2022		2021		2022		2021		2022		2021
	In millions
Service cost	$	—	$	—	$	14	$	17	$	—	$	—
Interest cost	40		76		6		5		2		2
Expected return on plan assets	(74)		(127)		(13)		(12)		(2)		(6)
Amortization and deferrals:
Actuarial loss (gain)	1		15		10		13		(4)		(4)
Prior service cost (credit)	—		—		2		—		(3)		(3)
Net periodic benefit (credit) cost	(33)		(36)		19		23		(7)		(11)
Settlement loss	—		1		—		—		—		—
Total benefit (credit) cost	$	(33)	$	(35)	$	19	$	23	$	(7)	$	(11)