PLANTS, EQUIPMENT AND FACILITIES (Schedule Of Plants, Equipment And Facilities, At Cost) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	$ 1,680.8	$ 1,567.1
Land and land improvements
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	34.1	30.1
Buildings
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	236.3	192.4
Machinery and equipment
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	1,041.4	880.7
Construction in progress
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	$ 369.0	$ 463.9