Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Periodic benefit cost related to our defined benefit plans, net

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 March 31
Service cost	$	40	$	35	$	2	$	1
Interest cost	18		21		2		2
Expected return on plan assets	(48)		(44)		—		—
Amortization of:
Net actuarial loss	20		18		—		—
Prior service credit	(4)		(5)		(2)		(1)
Net periodic benefit cost	$	26	$	25	$	2	$	2