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CONTINGENCIES - Additional Information (Detail) cubic_yard in Millions, $ in Millions									1 Months Ended		3 Months Ended	6 Months Ended
	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 ($) Company mi	Mar. 04, 2016 cubic_yard mi	Apr. 11, 2014 mi	Apr. 30, 2015 mi	May 31, 2007 Company mi	Mar. 28, 2020 USD ($) sites	Jun. 29, 2019 USD ($)	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)
Loss Contingencies [Line Items]
Superfund sites | sites											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
Approximate time for remedial design							4 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
Minimum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable	$ 412.0
Maximum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable	$ 460.0
Property, Plant and Equipment, Other Types
Loss Contingencies [Line Items]
Environmental remediation costs, reserve											$ 208.6		$ 213.8
Reserve for environmental remediation costs, current											58.8
Reserve for environmental remediation costs, noncurrent											149.8
Accrual for environmental loss contingencies, EPA funded amount												$ 15.7
Accrual for environmental loss contingencies, obligation after EPA funding											192.9
Property, Plant and Equipment, Other Types | Minimum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable												142.8
Property, Plant and Equipment, Other Types | Maximum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable												$ 280.8
Centredale Site
Loss Contingencies [Line Items]
Environmental remediation costs, reserve														$ 77.7
Environmental remediation costs deemed probable and reasonably estimable											$ 110.4
Kerr McGee Chemical Site
Loss Contingencies [Line Items]
Environmental remediation costs, reserve															$ 26.0
Cargo and Freight
Loss Contingencies [Line Items]
Outstanding obligations														$ 50.8
Lower Passaic Cooperating Parties Group
Loss Contingencies [Line Items]
Number of Companies | Company										47

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