Pension Plans and Other Post Employment Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Successor						Predecessor
(In millions)	Nine Months Ended September 30, 2018			For the Period September 1 - September 30, 2017			For the Period January 1 - August 31, 2017
Defined Benefit Pension Plans:
Service cost	$	99		$	12		$	92
Interest cost	565			62			524
Expected return on plan assets	(903		)	(102		)	(824		)
Amortization of unrecognized (gain) loss	(1		)	—			506
Amortization of prior service benefit	—			—			(3		)
Curtailment/settlement gain	(2		)	—			—
Net periodic benefit (credit) cost - Total	$	(242	)	$	(28	)	$	295
Less: Discontinued operations	—			—			3
Net periodic benefit (credit) cost - Continuing operations	$	(242	)	$	(28	)	$	292
Other Post Employment Benefits:
Service cost	$	7		$	1		$	6
Interest cost	63			6			60
Amortization of unrecognized loss	—			—			61
Amortization of prior service benefit	—			—			(46		)
Net periodic benefit cost - Continuing operations	$	70		$	7		$	81

	Successor						Predecessor
(In millions)	Three Months Ended September 30, 2018			For the Period September 1 - September 30, 2017			For the Period July 1 - August 31, 2017
Defined Benefit Pension Plans:
Service cost	$	32		$	12		$	25
Interest cost	186			62			132
Expected return on plan assets	(299		)	(102		)	(207		)
Amortization of unrecognized loss	—			—			127
Amortization of prior service benefit	—			—			(1		)
Curtailment/settlement loss	2			—			—
Net periodic benefit (credit) cost - Total	$	(79	)	$	(28	)	$	76
Less: Discontinued operations	—			—			1
Net periodic benefit (credit) cost - Continuing operations	$	(79	)	$	(28	)	$	75
Other Post Employment Benefits:
Service cost	$	3		$	1		$	2
Interest cost	20			6			15
Amortization of unrecognized loss	—			—			15
Amortization of prior service benefit	—			—			(11		)
Net periodic benefit cost - Continuing operations	$	23		$	7		$	21