CONTINGENCIES AND COMMITMENTS (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Legal Proceedings [Member]	Sep. 30, 2012 Environmental Matters [Member]	Dec. 31, 2011 Environmental Matters [Member]	Sep. 30, 2012 Standby Letters Of Credit [Member]	Dec. 31, 2011 Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Litigation Settlement Gross	$ 5.2
Accrual For Environmental Loss Contingencies		21.6	20.5
Environmental Decommisioning Costs		4.2
Letters of Credit Outstanding Amount				$ 42.8	$ 55.8