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PENSION PLANS (Asset Allocations) (Details) - Pension Plan - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS    
Asset allocations by asset category 100.00% 100.00%
Equity Securities    
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS    
Asset allocations by asset category 50.60% 40.60%
Equity securities included the entity's common stock $ 0.1 $ 0.1
Debt Securities    
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS    
Asset allocations by asset category 34.00% 41.60%
Other    
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS    
Asset allocations by asset category 15.40% 17.80%