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PENSION PLANS (Details 3) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]    
Projected benefit obligation $ 2,139.2 $ 1,949.4
Accumulated benefit obligation 2,125.8 1,941.2
Fair value of plan assets $ 1,981.0 $ 1,906.9