BENEFIT PLANS (Benefit Costs Included in Accumulated Other Comprehensive Loss that have not yet Recognized in Net Periodic Pension Cost) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Accumulated other comprehensive loss	$ 263.3	$ 202.2	$ 276.4
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost, net of accumulated taxes of $4.0 and $3.1 in 2014 and 2013, respectively, for pension benefits and $(2.1) and $(2.6) in 2014 and 2013, respectively, for other benefits	6.6	5.1
Net actuarial loss, net of accumulated taxes of $145.5 and $112.0 in 2014 and 2013, respectively, for pension benefits and $2.7 and $2.8 in 2014 and 2013, respectively, for other benefits	255.7	196.7
Accumulated other comprehensive loss	262.3	201.8
Prior service cost, accumulated taxes	4.0	3.1
Net Actuarial Loss, Accumulated Taxes	145.5	112.0
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost, net of accumulated taxes of $4.0 and $3.1 in 2014 and 2013, respectively, for pension benefits and $(2.1) and $(2.6) in 2014 and 2013, respectively, for other benefits	(3.5)	(4.3)
Net actuarial loss, net of accumulated taxes of $145.5 and $112.0 in 2014 and 2013, respectively, for pension benefits and $2.7 and $2.8 in 2014 and 2013, respectively, for other benefits	4.5	4.7
Accumulated other comprehensive loss	1.0	0.4
Prior service cost, accumulated taxes	(2.1)	(2.6)
Net Actuarial Loss, Accumulated Taxes	$ 2.7	$ 2.8