Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

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	2015			2014			2015			2014			2015			2014
Service cost	$	1		$	1		$	1		$	1		$	1		$	1
Interest cost	37			42			8			4			4			7
Expected return on plan assets	(48		)	(49		)	(8		)	(2		)	—			—
Amortization:
Actuarial loss	13			11			1			1			—			—
Prior service credit	—			—			—			—			(5		)	(10		)
Settlement and curtailment (gain) loss	—			—			1			—			(16		)	—
Net periodic benefit cost (credit)	$	3		$	5		$	3		$	4		$	(16	)	$	(2	)

	Nine Months Ended September 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2015			2014			2015			2014			2015			2014
Service cost	$	2		$	2		$	4		$	4		$	2		$	2
Interest cost	112			126			23			13			14			19
Expected return on plan assets	(143		)	(145		)	(25		)	(8		)	—			—
Amortization:
Actuarial loss	40			32			4			4			—			—
Prior service credit	(2		)	(2		)	—			—			(19		)	(29		)
Settlement and curtailment (gain) loss	—			—			13			2			(63		)	—
Net periodic benefit cost (credit)	$	9		$	13		$	19		$	15		$	(66	)	$	(8	)