ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Amortization of pension and other postretirement plan items:
Total net periodic benefit cost, net of tax		$ (2.6)	$ (2.2)	$ (7.7)	$ (6.4)
Amount reclassified from accumulated other comprehensive income
Amortization of pension and other postretirement plan items:
Prior service cost	[1]			0.3
Recognized actuarial loss	[1]			(12.3)
Total net periodic benefit cost, before tax				(12.0)
Total net periodic benefit cost, tax benefit				4.5
Total net periodic benefit cost, net of tax				$ (7.5)

[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).