ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Amortization of pension and other postretirement plan items:
Net of tax	$ 61.1		$ (74.2)	$ (23.9)
Amount reclassified from accumulated other comprehensive income
Amortization of pension and other postretirement plan items:
Prior service cost	(1.4)	[1]
Recognized actuarial loss	(11.7)	[1]
Total before tax	(13.1)
Tax benefit	4.9
Net of tax	$ (8.2)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 11 Benefit Plans for additional details).