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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - FAIR VALUE OF PLAN ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 386	$ 384	$ 436
Equity securities
Defined Benefit Plan Disclosure
Target allocation of plan assets (as a percent)	65.00%
Equity securities | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 178	169
Debt securities
Defined Benefit Plan Disclosure
Target allocation of plan assets (as a percent)	35.00%
Pension Plan Assets - Gross | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 389	385
U.S. government securities | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	13	16
Corporate bonds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	85	78
Common/collective trusts | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	18	12
Bond funds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	18	33
Blend funds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	48	48
Other | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	29	29
Net Payables | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	3	1
Level 1 | Equity securities | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	178	169
Level 1 | Pension Plan Assets - Gross | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	257	266
Level 1 | U.S. government securities | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	13	16
Level 1 | Bond funds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	18	33
Level 1 | Blend funds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	48	48
Level 2 | Pension Plan Assets - Gross | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	132	119
Level 2 | Corporate bonds | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	85	78
Level 2 | Common/collective trusts | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	18	12
Level 2 | Other | Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 29	$ 29

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Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6749337

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6520858

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

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-Name Accounting Standards Codification
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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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