Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Benefit Costs Included in Accumulated Other Comprehensive Loss that have not yet Recognized in Net Periodic Pension Cost) (Details)

v3.6.0.2
BENEFIT PLANS (Benefit Costs Included in Accumulated Other Comprehensive Loss that have not yet Recognized in Net Periodic Pension Cost) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Pension Benefits    
Weighted-average assumptions used to determine net periodic benefit cost at December 31,    
Prior service cost, net of accumulated taxes of $3.4 and $3.6 in 2016 and 2015, respectively, for pension benefits and $(1.2) and $(1.6) in 2016 and 2015, respectively, for other benefits $ 5.6 $ 6.1
Net actuarial loss, net of accumulated taxes of $143.5 and $132.6 in 2016 and 2015, respectively, for pension benefits and $5.0 and $3.6 in 2016 and 2015, respectively, for other benefits 254.1 236.4
Accumulated other comprehensive loss 259.7 242.5
Prior service cost, accumulated taxes 3.4 3.6
Net Actuarial Loss, Accumulated Taxes 143.5 132.6
Other Benefits    
Weighted-average assumptions used to determine net periodic benefit cost at December 31,    
Prior service cost, net of accumulated taxes of $3.4 and $3.6 in 2016 and 2015, respectively, for pension benefits and $(1.2) and $(1.6) in 2016 and 2015, respectively, for other benefits (2.1) (2.8)
Net actuarial loss, net of accumulated taxes of $143.5 and $132.6 in 2016 and 2015, respectively, for pension benefits and $5.0 and $3.6 in 2016 and 2015, respectively, for other benefits 8.3 6.1
Accumulated other comprehensive loss 6.2 3.3
Prior service cost, accumulated taxes (1.2) (1.6)
Net Actuarial Loss, Accumulated Taxes $ 5.0 $ 3.6