Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of defined benefit plans disclosures

The following table summarizes the components of net periodic pension cost and the cost of other postretirement benefits for the periods presented:

	Three Months Ended September 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2016			2015			2016			2015			2016			2015
Service cost	$	1		$	1		$	1		$	1		$	1		$	1
Interest cost	37			37			7			8			5			4
Expected return on plan assets	(47		)	(48		)	(7		)	(8		)	—			—
Amortization:
Actuarial loss	12			13			1			1			—			—
Prior service credit	—			—			—			—			(3		)	(5		)
Settlement and curtailment (gain) loss	—			—			1			1			—			(16		)
Net periodic benefit cost (credit)	$	3		$	3		$	3		$	3		$	3		$	(16	)

	Nine Months Ended September 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2016			2015			2016			2015			2016			2015
Service cost	$	2		$	2		$	4		$	4		$	5		$	2
Interest cost	111			112			21			23			13			14
Expected return on plan assets	(140		)	(143		)	(23		)	(25		)	—			—
Amortization:
Actuarial loss	35			40			3			4			—			—
Prior service credit	(2		)	(2		)	—			—			(11		)	(19		)
Settlement and curtailment (gain) loss	—			—			1			13			—			(63		)
Net periodic benefit cost (credit)	$	6		$	9		$	6		$	19		$	7		$	(66	)