Retirement and Post-Retirement Benefit Plans (Tables)

6 Months Ended

Apr. 30, 2018

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
	2018			2017			2018			2017			2018			2017
	In millions
Service cost	$	—		$	—		$	14		$	12		$	—		$	—
Interest cost	113			117			6			4			4			5
Expected return on plan assets	(179		)	(170		)	(10		)	(8		)	(6		)	(6		)
Amortization and deferrals:
Actuarial loss (gain)	16			18			7			10			(4		)	(5		)
Prior service benefit	—			—			(1		)	(1		)	(5		)	(5		)
Net periodic (credit) benefit cost	(50		)	(35		)	16			17			(11		)	(11		)
Settlement loss	—			3			—			—			—			—
Total periodic (credit) benefit cost	$	(50	)	$	(32	)	$	16		$	17		$	(11	)	$	(11	)

	Six months ended April 30
	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	$	—		$	—		$	28		$	24		$	—		$	—
Interest cost	226			234			12			8			8			9
Expected return on plan assets	(360		)	(339		)	(20		)	(16		)	(12		)	(12		)
Amortization and deferrals:
Actuarial loss (gain)	31			36			14			20			(8		)	(7		)
Prior service benefit	—			—			(2		)	(2		)	(10		)	(10		)
Net periodic benefit (credit) cost	(103		)	(69		)	32			34			(22		)	(20		)
Settlement loss	1			3			—			—			—			—
Total periodic benefit (credit) cost	$	(102	)	$	(66	)	$	32		$	34		$	(22	)	$	(20	)