Pension and Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the three and six months ended June 30, 2021 and 2020, were as follows:

	Millions of Dollars
	Pension Benefits					Other Benefits
	2021			2020		2021	2020
	U.S.		Int’l.	U.S.	Int’l.
Components of Net Periodic Benefit Cost
Three Months Ended June 30
Service cost	$	37	8	34	7	2	2
Interest cost	20		4	24	5	1	1
Expected return on plan assets	(41)		(14)	(42)	(12)	—	—
Recognized net actuarial loss (gain)	14		6	15	4	(1)	—
Settlements	29		—	39	—	—	—
Net periodic benefit cost*	$	59	4	70	4	2	3
Six Months Ended June 30
Service cost	$	74	17	67	14	3	3
Interest cost	40		9	49	11	2	3
Expected return on plan assets	(82)		(29)	(83)	(25)	—	—
Amortization of prior service credit	—		—	—	—	(1)	(1)
Recognized net actuarial loss (gain)	29		12	29	8	(1)	—
Settlements	29		—	39	—	—	—
Net periodic benefit cost*	$	90	9	101	8	3	5
* Included in the “Operating expenses” and “Selling, general and administrative expenses” line items on our consolidated statement of operations.