POSTRETIREMENT BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of Effect on Operations of Pension Plans and Principal Retiree Benefit Plans

EFFECT ON OPERATIONS OF PENSION PLANS
	Principal pension plans
	Three months ended September 30						Nine months ended September 30
(In millions)	2017			2016			2017				2016
Service cost for benefits earned	$	267		$	307		$	810			$	913
Prior service cost amortization	73			76			218				228
Expected return on plan assets	(847		)	(837		)	(2,545		)		(2,507		)
Interest cost on benefit obligations	715			736			2,144				2,205
Net actuarial loss amortization	702			612			2,109				1,836
Curtailment loss (gain)	—			—			43			(a)	(1		)
Pension plans cost	$	910		$	894		$	2,779			$	2,674

(a) Curtailment loss resulting from our intent to sell the Industrial Solutions business within our Power segment.

	Other pension plans
	Three months ended September 30						Nine months ended September 30
(In millions)	2017			2016			2017				2016
Service cost for benefits earned	$	156		$	106		$	430			$	337
Prior service credit amortization	(2		)	—			(4		)		(1		)
Expected return on plan assets	(324		)	(264		)	(919		)		(786		)
Interest cost on benefit obligations	158			172			445				512
Net actuarial loss amortization	110			68			320				197
Curtailment loss	11			—			11			(a)	—
Pension plans cost	$	109		$	82		$	283			$	259

(a) Curtailment loss resulting from a Canadian manufacturing plant closure.

EFFECT ON OPERATIONS OF PRINCIPAL RETIREE BENEFIT PLANS
	Principal retiree benefit plans
	Three months ended September 30						Nine months ended September 30
(In millions)	2017			2016			2017				2016
Service cost for benefits earned	$	25		$	32		$	77			$	84
Prior service credit amortization	(42		)	(41		)	(128		)		(123		)
Expected return on plan assets	(9		)	(11		)	(27		)		(33		)
Interest cost on benefit obligations	55			62			168				188
Net actuarial gain amortization	(20		)	(12		)	(61		)		(39		)
Curtailment loss	—			—			3			(a)	—
Retiree benefit plans cost	$	9		$	30		$	32			$	77

(a) Curtailment loss resulting from our intent to sell the Industrial Solutions business within our Power segment.