Retirement and Post-Retirement Benefit Plans (Tables)

9 Months Ended

Jul. 31, 2018

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
	2018			2017			2018			2017			2018			2017
	In millions
Service cost	$	—		$	—		$	14		$	12		$	—		$	1
Interest cost	113			117			6			4			4			4
Expected return on plan assets	(180		)	(168		)	(10		)	(8		)	(6		)	(7		)
Amortization and deferrals:
Actuarial loss (gain)	14			19			7			10			(4		)	(5		)
Prior service benefit	—			—			(1		)	(1		)	(5		)	(4		)
Net periodic (credit) benefit cost	(53		)	(32		)	16			17			(11		)	(11		)
Settlement loss	1			—			—			1			—			—
Total periodic (credit) benefit cost	$	(52	)	$	(32	)	$	16		$	18		$	(11	)	$	(11	)

	Nine months ended July 31
	U.S. Defined Benefit Plans						Non-U.S. Defined Benefit Plans						Post- Retirement Benefit Plans
	2018			2017			2018			2017			2018			2017
	In millions
Service cost	$	—		$	—		$	42		$	36		$	—		$	1
Interest cost	339			351			18			12			12			13
Expected return on plan assets	(540		)	(507		)	(30		)	(24		)	(18		)	(19		)
Amortization and deferrals:
Actuarial loss (gain)	45			55			21			30			(12		)	(12		)
Prior service benefit	—			—			(3		)	(3		)	(15		)	(14		)
Net periodic (credit) benefit cost	(156		)	(101		)	48			51			(33		)	(31		)
Settlement loss	2			3			—			1			—			—
Total periodic (credit) benefit cost	$	(154	)	$	(98	)	$	48		$	52		$	(33	)	$	(31	)