ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Amortization of pension and other postretirement plan items:
Total net periodic benefit cost, net of tax	$ (2.5)		$ (2.1)
Amount reclassified from accumulated other comprehensive income
Amortization of pension and other postretirement plan items:
Prior service cost	0.1	[1]
Recognized actuarial loss	(4.1)	[1]
Total net periodic benefit cost, before tax	(4.0)
Total net periodic benefit cost, tax benefit	1.5
Total net periodic benefit cost, net of tax	$ (2.5)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 7 Benefit Plans for additional details).