CONTINGENCIES AND COMMITMENTS (Detail) (USD $)		3 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Scenario, Forecast [Member]	Oct. 10, 2013 Failure to Meet Contractual Obligations [Member]	Mar. 31, 2014 Environmental Matters [Member]	Dec. 31, 2013 Environmental Matters [Member]	Mar. 31, 2014 Standby Letters Of Credit [Member]	Dec. 31, 2013 Standby Letters Of Credit [Member]	Mar. 31, 2014 FinancialStandbyLetterOfCreditMember	Dec. 31, 2013 FinancialStandbyLetterOfCreditMember
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies				$ 16,200,000	$ 16,300,000
Letters of credit, outstanding						41,100,000	47,200,000	20,300,000	23,200,000
Surety Bond Outstanding	52,900,000
Damages sought		1,000,000,000	25,000,000
Range of possible loss, minimum		0
Range of possible loss, maximum		$ 25,000,000