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CONTINGENCIES (Detail) cubic_yard in Millions, $ in Millions											1 Months Ended		3 Months Ended
	Apr. 14, 2021 USD ($)	Aug. 12, 2019 USD ($)	Oct. 10, 2018 mi	Jun. 30, 2018 USD ($) Company	May 17, 2017 Hazardous_Substance	Mar. 30, 2017 Company	Mar. 31, 2016 USD ($) Company mi	Mar. 04, 2016 cubic_yard mi	Apr. 11, 2014 mi	Feb. 24, 2012 municipality	Apr. 30, 2015 mi	May 31, 2007 Company mi	Apr. 03, 2021 USD ($) site	Jan. 02, 2021 USD ($)
Loss Contingencies [Line Items]
Superfund sites | site													28
Environmental remediation costs deemed probable and reasonably estimable							$ 1,400.0
Environmental remediation, period construction of treatment facility to be maintained													30 years
Number of miles of river | mi			9				8.3	8.3	8.3		17	17
Cubic yards of settlement | cubic_yard								3.5
Approximate implementation time							6 years
Number of other parties notified | Company							105
Number of companies offered cash out settlements | Company						20
Number of hazardous substances | Hazardous_Substance					8
Number of companies named in suit | Company				100
Estimated costs of remediation				$ 165.0
Number of municipalities, suit filed | municipality										42
Subsequent Event
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable	$ 441.0
Minimum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable		$ 420.0
Maximum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable		$ 468.0
Property, Plant and Equipment, Other Types
Loss Contingencies [Line Items]
Environmental remediation costs, reserve													$ 165.6	$ 174.2
Reserve for environmental remediation costs, current													46.2
Reserve for environmental remediation costs, noncurrent													119.4
Accrual for environmental loss contingencies, EPA funded amount													16.0
Accrual for environmental loss contingencies, obligation after EPA funding													149.6
Property, Plant and Equipment, Other Types | Minimum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable													101.1
Property, Plant and Equipment, Other Types | Maximum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable													235.8
Centredale Site
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable													69.6
Kerr McGee Chemical Site
Loss Contingencies [Line Items]
Environmental remediation costs, reserve													$ 23.6
Lower Passaic Cooperating Parties Group
Loss Contingencies [Line Items]
Number of companies | Company												47

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