Pension and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

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 March 31,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018			2017			2018		2017
Service cost	$	1		$	1		$	1		$	1		$	2	$	2
Interest cost	30			34			6			5			4		4
Expected return on plan assets	(43		)	(44		)	(8		)	(7		)	—		—
Amortization:
Actuarial loss	13			12			3			2			—		—
Prior service cost (credit)	(1		)	(1		)	—			—			3		(4		)
Net periodic cost	$	—		$	2		$	2		$	1		$	9	$	2

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 March 31,
	United States Pension Benefits					Foreign Pension Benefits				Other Postretirement Benefits
Millions of dollars	2018			2017		2018		2017		2018		2017
Operating profit (loss)	$	1		$	1	$	1	$	1	$	2	$	2
Interest and sundry (income) expense	(1		)	1		1		—		7		—
Net periodic benefit cost (credit)	$	—		$	2	$	2	$	1	$	9	$	2