CONTINGENCIES AND COMMITMENTS (Detail) (USD $)								6 Months Ended	0 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Environmental Matters [Member]	Dec. 31, 2013 Environmental Matters [Member]	Jun. 30, 2014 Standby Letters Of Credit [Member]	Dec. 31, 2013 Standby Letters Of Credit [Member]	Jun. 30, 2014 FinancialStandbyLetterOfCreditMember	Dec. 31, 2013 FinancialStandbyLetterOfCreditMember	Jun. 30, 2014 Scenario, Forecast [Member]	Oct. 10, 2013 Failure to Meet Contractual Obligations [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies		$ 15,900,000	$ 16,300,000
Letters of credit, outstanding				36,600,000	47,200,000	25,900,000	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	$ 35,000,000