Retirement and Post-Retirement Benefit Plans (Tables)

9 Months Ended

Jul. 31, 2019

Retirement Benefits [Abstract]

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

The components of HP’s pension and post-retirement (credit) benefit 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
	2019			2018			2019			2018			2019			2018
	In millions
Service cost	$	—		$	—		$	14		$	14		$	—		$	—
Interest cost	123			113			6			6			4			4
Expected return on plan assets	(146		)	(180		)	(9		)	(10		)	(5		)	(6		)
Amortization and deferrals:
Actuarial loss (gain)	15			14			8			7			(8		)	(4		)
Prior service benefit	—			—			(1		)	(1		)	(3		)	(5		)
Net periodic (credit) benefit cost	(8		)	(53		)	18			16			(12		)	(11		)
Curtailment gain	—			—			(9		)	—			—			—
Settlement loss	1			1			—			—			—			—
Total periodic (credit) benefit cost	$	(7	)	$	(52	)	$	9		$	16		$	(12	)	$	(11	)

	Nine months ended July 31
	U.S. Defined Benefit Plans						Non-U.S. Defined Benefit Plans						Post- Retirement Benefit Plans
	2019			2018			2019			2018			2019			2018
	In millions
Service cost	$	—		$	—		$	43		$	42		$	—		$	—
Interest cost	369			339			18			18			12			12
Expected return on plan assets	(437		)	(540		)	(28		)	(30		)	(15		)	(18		)
Amortization and deferrals:
Actuarial loss (gain)	45			45			24			21			(24		)	(12		)
Prior service benefit	—			—			(2		)	(3		)	(9		)	(15		)
Net periodic (credit) benefit cost	(23		)	(156		)	55			48			(36		)	(33		)
Curtailment gain	—			—			(9		)	—			—			—
Settlement loss	2			2			—			—			—			—
Total periodic (credit) benefit cost	$	(21	)	$	(154	)	$	46		$	48		$	(36	)	$	(33	)