Defined Benefit Postretirement Plans (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The following summarizes the components of net periodic benefit costs (credits):

	Three Months Ended March 31,
	Pension Benefits				Other Benefits
(In millions)	2022		2021		2022		2021
Service cost	$	4	$	4	$	—	$	—
Interest cost	2		2		—		—
Expected return on plan assets	(2)		(2)		—		—
Amortization:
– prior service credit	(2)		(2)		(4)		(4)
– actuarial loss	—		2		1		1
Net periodic benefit costs (credits)(a)	$	2	$	4	$	(3)	$	(3)

(a)Net periodic benefit costs (credits) reflects a calculated market-related value of plan assets which recognizes changes in fair value over three years.