Retirement and Post-Retirement Benefit Plans (Tables)

6 Months Ended

Apr. 30, 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 April 30
	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	$	—	$	—	$	11	$	14	$	—	$	—
Interest cost	55		40		10		5		3		2
Expected return on plan assets	(64)		(75)		(13)		(12)		(3)		(2)
Amortization and deferrals:
Actuarial loss (gain)	4		2		1		9		(4)		(4)
Prior service cost (credit)	—		—		2		1		(3)		(3)
Net periodic benefit (credit) cost	(5)		(33)		11		17		(7)		(7)
Settlement loss	—		—		(1)		—		—		—
Special termination benefit cost	105		—		—		—		34		—
Total periodic benefit (credit) cost	$	100	$	(33)	$	10	$	17	$	27	$	(7)
	Six months ended April 30
	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	$	—	$	—	$	20	$	28	$	—	$	—
Interest cost	109		80		20		11		7		4
Expected return on plan assets	(129)		(149)		(26)		(25)		(6)		(4)
Amortization and deferrals:
Actuarial loss (gain)	9		3		2		19		(8)		(8)
Prior service cost (credit)	—		—		3		3		(6)		(6)
Net periodic benefit (credit) cost	(11)		(66)		19		36		(13)		(14)
Special termination benefit cost	105		—		—		—		34		—
Total periodic benefit (credit) cost	$	94	$	(66)	$	19	$	36	$	21	$	(14)