Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2017

Retirement Benefits, Description [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 June 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2017			2016			2017			2016			2017			2016
Service cost	$	—		$	—		$	2		$	2		$	2		$	2
Interest cost	33			37			6			7			4			4
Expected return on plan assets	(44		)	(46		)	(8		)	(8		)	—			—
Amortization:
Actuarial loss	13			11			1			1			—			—
Prior service credit	—			(1		)	—			—			(3		)	(4		)
Settlement and curtailment (gain) loss	—			—			1			(1		)	—			—
Net periodic cost	$	2		$	1		$	2		$	1		$	3		$	2

	Six Months Ended June 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2017			2016			2017			2016			2017			2016
Service cost	$	1		$	1		$	3		$	3		$	4		$	4
Interest cost	67			74			11			14			8			8
Expected return on plan assets	(88		)	(93		)	(15		)	(16		)	—			—
Amortization:
Actuarial loss	25			23			3			2			—			—
Prior service credit	(1		)	(2		)	—			—			(7		)	(8		)
Settlement and curtailment (gain) loss	—			—			1			—			—			—
Net periodic cost	$	4		$	3		$	3		$	3		$	5		$	4

The following table summarizes the net periodic cost recognized in operating profit and interest and sundry (income) expense for the periods presented:

	Three Months Ended June 30,
	United States Pension Benefits				Foreign Pension Benefits					Other Postretirement Benefits
Millions of dollars	2017		2016		2017		2016			2017		2016
Operating profit (loss)	$	—	$	—	$	2	$	2		$	2	$	2
Interest and sundry (income) expense	2		1		—		(1		)	1		—
Net periodic benefit cost (credit)	$	2	$	1	$	2	$	1		$	3	$	2

	Six Months Ended June 30,
	United States Pension Benefits				Foreign Pension Benefits				Other Postretirement Benefits
Millions of dollars	2017		2016		2017		2016		2017		2016
Operating profit (loss)	$	1	$	1	$	3	$	3	$	4	$	4
Interest and sundry (income) expense	3		2		—		—		1		—
Net periodic benefit cost (credit)	$	4	$	3	$	3	$	3	$	5	$	4