Pension Plans and Other Post Employment Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2021		2020		2021		2020
Defined Benefit Pension Plans:
Service cost	$	7	$	6	$	19	$	19
Interest cost	91		139		273		420
Expected return on plan assets	(228)		(250)		(686)		(750)
Amortization of unrecognized loss	14		1		41		3
Amortization of prior service benefit	—		—		(1)		(1)
Settlement loss	—		—		1		3
Net periodic (credit) benefit cost	$	(116)	$	(104)	$	(353)	$	(306)
Other Post Employment Benefits:
Service cost	$	1	$	—	$	1	$	1
Interest cost	5		16		16		49
Amortization of unrecognized loss	23		1		70		1
Amortization of prior service benefit	(231)		—		(692)		—
Curtailment gain	—		—		(1)		—
Net periodic (credit) benefit cost	$	(202)	$	17	$	(606)	$	51