Employee Benefit Plans

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

EMPLOYEE BENEFIT PLANS

7.    EMPLOYEE BENEFIT PLANS

The components of net periodic benefit cost related to our defined benefit plans were as follows (in millions):

	Pension Plans				Other Postretirement Benefit Plans
	2021		2020		2021		2020
Three months ended June 30
Service cost	$	41	$	35	$	1	$	2
Interest cost	18		22		1		2
Expected return on plan assets	(48)		(46)		—		—
Amortization of:
Net actuarial loss	20		19		—		—
Prior service credit	(5)		(5)		(1)		(2)
Special charges	4		1		—		—
Net periodic benefit cost	$	30	$	26	$	1	$	2
Six months ended June 30
Service cost	$	81	$	70	$	3	$	3
Interest cost	36		43		3		4
Expected return on plan assets	(96)		(90)		—		—
Amortization of:
Net actuarial loss	40		37		—		—
Prior service credit	(9)		(10)		(3)		(3)
Special charges	4		1		—		—
Net periodic benefit cost	$	56	$	51	$	3	$	4

The components of net periodic benefit cost other than the service cost component (i.e., the non-service cost components) are included in “other income, net” in the statements of income.

As previously disclosed in our annual report on Form 10-K for the year ended December 31, 2020, we plan to contribute approximately $128 million to our pension plans and $22 million to our other postretirement benefit plans during 2021. During the six months ended June 30, 2021 and 2020, we contributed $31 million and $19 million, respectively, to our pension plans and $8 million and $7 million, respectively, to our other postretirement benefit plans.