ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Amortization of pension and other postretirement plan items:
Total net periodic benefit cost, net of tax		$ (2.2)	$ (2.5)
Amount reclassified from accumulated other comprehensive income
Amortization of pension and other postretirement plan items:
Prior service cost	[1]	0.1
Recognized actuarial loss	[1]	(3.7)
Total net periodic benefit cost, before tax		(3.6)
Total net periodic benefit cost, tax benefit		1.3
Total net periodic benefit cost, net of tax		$ (2.3)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 9 Benefit Plans for additional details).