RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Weighted Average Assumptions Used to Measure the Benefit Obligation) (Details)	Dec. 31, 2016	Dec. 31, 2015
Weighted average assumptions used to measure the benefit obligation
Discount rate	4.10%	4.50%
Rate of increase in compensation	2.60%	2.70%

Expected rate of compensation increases (for pay-related plans).

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

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