RETIREMENT BENEFITS - Health Care Cost-Trend Rate (Details)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
U.S. Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Health care cost increase following year (as a percent)	7.00%	7.50%
Ultimate rate to which cost increase is assumed to decline (as a percent)	5.00%	5.00%
Year in which the ultimate rate is reached	2020	2020
Non-U.S. Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Health care cost increase following year (as a percent)	6.87%	6.94%
Ultimate rate to which cost increase is assumed to decline (as a percent)	6.86%	6.93%
Non-U.S. Postretirement Benefit Plans \| Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans
Year in which the ultimate rate is reached	2016	2015
Non-U.S. Postretirement Benefit Plans \| Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans
Year in which the ultimate rate is reached	2029	2027

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Health Care Cost Trend Rate
-URI http://asc.fasb.org/extlink&oid=6514820

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

The ultimate trend rate for health care costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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Year the ultimate health care cost trend rate is expected to be reached, in CCYY format.

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- Definition

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