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PENSION PLANS (Details 3) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]    
Projected benefit obligation $ 2,717.2 $ 2,685.9
Accumulated benefit obligation 2,685.7 2,655.0
Fair value of plan assets $ 2,078.5 $ 2,036.5