Pension and Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

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 March 31,
	United States Pension Benefits				Foreign Pension Benefits				Other Postretirement Benefits
Millions of dollars	2021		2020		2021		2020		2021		2020
Service cost	$	1	$	1	$	1	$	2	$	—	$	2
Interest cost	19		25		4		4		1		3
Expected return on plan assets	(39)		(41)		(9)		(8)		—		—
Amortization:
Actuarial loss	17		15		5		3		—		—
Prior service credit	—		—		—		—		(11)		(2)
Settlement and curtailment (gain) loss	—		—		—		—		—		—
Net periodic benefit cost (credit)	$	(2)	$	—	$	1	$	1	$	(10)	$	3

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	2021		2020		2021		2020		2021		2020
Operating profit (loss)	$	1	$	1	$	1	$	2	$	—	$	2
Interest and sundry (income) expense	(3)		(1)		—		(1)		(10)		1
Net periodic benefit cost	$	(2)	$	—	$	1	$	1	$	(10)	$	3