ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Amortization of pension and other postretirement plan items:
Total net periodic benefit cost, net of tax		$ (2.6)	$ (2.1)	$ (5.1)	$ (4.2)
Amount reclassified from accumulated other comprehensive income
Amortization of pension and other postretirement plan items:
Prior service cost	[1]			0.2
Recognized actuarial loss	[1]			(8.2)
Total net periodic benefit cost, before tax				(8.0)
Total net periodic benefit cost, tax benefit				3.0
Total net periodic benefit cost, net of tax				$ (5.0)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 8 Benefit Plans for additional details).