EMPLOYEE BENEFIT PLANS (Tables) - Qualified Defined Benefit [Member]

12 Months Ended

Dec. 31, 2017

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Assumptions Used [Table Text Block]

Weighted average assumptions used to determine benefit obligations:

The rates below vary by plan and related work group.

	2017	2016
Discount rates	3.69% to 3.78%	4.29% to 4.50%
Rate of compensation increases	2.11% to 3.00%	2.12% to 2.59%

Weighted average assumptions used to determine net periodic benefit cost:

The rates below vary by plan and related work group.

	2017	2016	2015
Discount rates	4.29% to 4.50%	4.55% to 4.69%	4.20%
Expected return on plan assets	5.50% to 6.00%	6.00% to 6.50%	6.50%
Rate of compensation increases	2.12% to 2.59%	2.06% to 2.65%	2.85% to 3.91%

Schedule of Allocation of Plan Assets [Table Text Block]

Plan asset by fund category (in millions):

	2017		2016		Fair Value Hierarchy
Fund type:
U.S. equity market fund	$	515	$	545	1
Non-U.S. equity fund	226		218		1
Credit bond index fund	1,232		989		1
Plan assets in common commingled trusts	$	1,973	$	1,752
Real estate	97		91		(a)
Cash equivalents	13		3		1
Total plan assets	$	2,083	$	1,846

(a) In accordance with Subtopic 820-10, certain investments that are measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.

The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows: 

	Target	2017		2016
Asset category:
Domestic equity securities	5% - 33%	25	%	30	%
Non-U.S. equity securities	1% - 16%	11	%	12	%
Fixed income securities	48% - 95%	59	%	53	%
Real estate	2% - 8%	4	%	5	%
Cash equivalents	0%	1	%	—	%
Plan assets		100	%	100	%

Schedule of Net Funded Status [Table Text Block]

The following table sets forth the status of the qualified defined-benefit pension plans (in millions):

	2017			2016
Projected benefit obligation (PBO)
Beginning of year	$	2,043		$	1,898
Service cost	39			37
Interest cost	74			73
Actuarial loss	300			104
Benefits paid	(69		)	(69		)
End of year	$	2,387		$	2,043
Plan assets at fair value
Beginning of year	$	1,846		$	1,737
Actual return on plan assets	291			178
Employer contributions	15			—
Benefits paid	(69		)	(69		)
End of year	$	2,083		$	1,846
Unfunded status	$	(304	)	$	(197	)
Percent funded	87		%	90		%

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

The amounts recognized in the consolidated balance sheets (in millions): 

	2017			2016
Accrued benefit liability-long term	$	335		$	225
Plan assets-long term (within Other noncurrent assets)	(31		)	(28		)
Total liability recognized	$	304		$	197

The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):

	2017			2016
Prior service credit	$	(9	)	$	(10	)
Net loss	597			509
Amount recognized in AOCL (pretax)	$	588		$	499

Schedule of Net Benefit Costs [Table Text Block]

Net pension expense for the qualified defined-benefit plans included the following components (in millions): 

	2017			2016			2015
Service cost	$	39		$	37		$	41
Interest cost	74			73			84
Expected return on assets	(106		)	(108		)	(122		)
Amortization of prior service credit	(1		)	(1		)	(1		)
Recognized actuarial loss	26			25			26
Settlement expense (special item)	—			—			14
Net pension expense	$	32		$	26		$	42

Schedule of Expected Benefit Payments [Table Text Block]

Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions): 

	Total
2018	$	97
2019	101
2020	116
2021	116
2022	130
2023– 2027	723