Retirement and Post-Retirement Benefit Plans (Tables)

9 Months Ended

Jul. 31, 2023

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 July 31
	U.S. Defined Benefit Plans				Non-U.S. Defined Benefit Plans				Post-Retirement Benefit Plans
	2023		2022		2023		2022		2023		2022
	In millions
Service cost	$	—	$	—	$	10	$	14	$	1	$	1
Interest cost	54		41		10		5		4		2
Expected return on plan assets	(65)		(72)		(13)		(12)		(4)		(2)
Amortization and deferrals:
Actuarial loss (gain)	4		1		1		9		(4)		(4)
Prior service cost (credit)	—		—		1		1		(2)		(2)
Net periodic benefit (credit) cost	(7)		(30)		9		17		(5)		(5)
Settlement gain	—		—		—		(1)		—		—
Total periodic benefit (credit) cost	$	(7)	$	(30)	$	9	$	16	$	(5)	$	(5)
	Nine months ended July 31
	U.S. Defined Benefit Plans				Non-U.S. Defined Benefit Plans				Post- Retirement Benefit Plans
	2023		2022		2023		2022		2023		2022
	In millions
Service cost	$	—	$	—	$	30	$	42	$	1	$	1
Interest cost	163		121		30		16		11		6
Expected return on plan assets	(194)		(221)		(39)		(37)		(10)		(6)
Amortization and deferrals:
Actuarial loss (gain)	13		4		3		28		(12)		(12)
Prior service cost (credit)	—		—		4		4		(8)		(8)
Net periodic benefit (credit) cost	(18)		(96)		28		53		(18)		(19)
Settlement gain	—		—		—		(1)		—		—
Special termination benefit cost	105		—		—		—		34		—
Total periodic benefit (credit) cost	$	87	$	(96)	$	28	$	52	$	16	$	(19)