Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement 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 June 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018			2017			2018			2017
Service cost	$	—		$	—		$	2		$	2		$	1		$	2
Interest cost	29			33			6			6			3			4
Expected return on plan assets	(42		)	(44		)	(9		)	(8		)	—			—
Amortization:
Actuarial loss	13			13			2			1			—			—
Prior service credit	—			—			—			—			(2		)	(3		)
Settlement and curtailment (gain) loss	—			—			(3		)	1			—			—
Net periodic benefit cost (credit)	$	—		$	2		$	(2	)	$	2		$	2		$	3

	Six Months Ended June 30,
	United States Pension Benefits						Foreign Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018			2017			2018		2017
Service cost	$	1		$	1		$	3		$	3		$	3	$	4
Interest cost	59			67			12			11			7		8
Expected return on plan assets	(85		)	(88		)	(17		)	(15		)	—		—
Amortization:
Actuarial loss	26			25			5			3			—		—
Prior service credit	(1		)	(1		)	—			—			1		(7		)
Settlement and curtailment (gain) loss	—			—			(3		)	1			—		—
Net periodic cost	$	—		$	4		$	—		$	3		$	11	$	5

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	2018		2017		2018			2017		2018		2017
Operating profit (loss)	$	—	$	—	$	2		$	2	$	1	$	2
Interest and sundry (income) expense	—		2		(4		)	—		1		1
Net periodic benefit cost (credit)	$	—	$	2	$	(2	)	$	2	$	2	$	3

	Six Months Ended June 30,
	United States Pension Benefits					Foreign Pension Benefits					Other Postretirement Benefits
Millions of dollars	2018			2017		2018			2017		2018		2017
Operating profit (loss)	$	1		$	1	$	3		$	3	$	3	$	4
Interest and sundry (income) expense	(1		)	3		(3		)	—		8		1
Net periodic benefit cost (credit)	$	—		$	4	$	—		$	3	$	11	$	5