PLANTS, EQUIPMENT AND FACILITIES (Schedule Of Plants, Equipment And Facilities, At Cost) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	$ 1,567.1	$ 1,310.4
Land and land improvements
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	30.1	25.2
Buildings
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	192.4	188.9
Machinery and equipment
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	880.7	795.0
Construction in progress
Property, Plant and Equipment [Line Items]
Plants, equipment and facilities, at cost	$ 463.9	$ 301.3