Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Principal pension plans

Defined Benefit Plan Disclosure [Line Items]

Cost of Benefit Plans [Table Text Block]

EFFECT ON OPERATIONS OF PENSION PLANS
	Principal pension plans
	Three months ended March 31
(In millions)		2016		2015
Service cost for benefits earned	$	315	$	361
Prior service cost amortization		76		52
Expected return on plan assets		(834)		(825)
Interest cost on benefit obligations		734		695
Net actuarial loss amortization		612		825
Curtailment loss		-		71
Pension plans cost	$	903	$	1,179

Other pension plans

Defined Benefit Plan Disclosure [Line Items]

Cost of Benefit Plans [Table Text Block]

	Other pension plans
	Three months ended March 31
(In millions)		2016		2015
Service cost for benefits earned	$	113	$	105
Prior service cost (credit) amortization		(1)		-
Expected return on plan assets		(263)		(209)
Interest cost on benefit obligations		172		133
Net actuarial loss amortization		64		74
Pension plans cost	$	85	$	103

Principal retiree benefit plans

Defined Benefit Plan Disclosure [Line Items]

Cost of Benefit Plans [Table Text Block]

EFFECT ON OPERATIONS OF PRINCIPAL RETIREE BENEFIT PLANS
	Principal retiree benefit plans
	Three months ended March 31
(In millions)	2016		2015
Service cost for benefits earned	$	25	$	41
Prior service cost (credit) amortization		(41)		33
Expected return on plan assets		(11)		(12)
Interest cost on benefit obligations		63		101
Net actuarial loss (gain) amortization		(13)		1
Curtailment loss		-		4
Retiree benefit plans cost	$	23	$	168