CONTINGENCIES - Additional Information (Detail) ft³ in Millions, $ in Millions									1 Months Ended		12 Months Ended
	Aug. 12, 2019 USD ($)	Oct. 10, 2018 mi	Jun. 30, 2018 USD ($) Company	May 17, 2017 Hazardous_Substance	Mar. 31, 2017 Company	Mar. 31, 2016 USD ($) age mi	Mar. 04, 2016 mi ft³	Apr. 11, 2014 mi	Apr. 30, 2015 mi	May 31, 2007 Company mi	Jan. 02, 2021 USD ($) site	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Superfund sites | site											28
Environmental remediation costs, reserve											$ 46.7	$ 57.8
Environmental remediation costs deemed probable and reasonable estimable						$ 1,400.0
Reserve for environmental loss contingencies, EPA funded amount											$ 15.9
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 | ft³							3.5
Approximate implementation time						6 years
Number of parties notified | age						105
Number of companies offered cash out settlements | Company					20
Number of hazardous substances | Hazardous_Substance				8
Number of defendants | Company			100
Estimated costs of remediation design			$ 165.0
Undiscounted environmental liability expected to be paid 2021											$ 1.4
Undiscounted environmental liability expected to be paid 2022											2.9
Undiscounted environmental liability expected to be paid in 2023											2.9
Undiscounted environmental liability expected to be paid in 2024											3.1
Undiscounted environmental liability expected to be paid in 2025											2.8
Undiscounted environmental liability expected to be paid thereafter											32.8
Leased Sites
Commitments and Contingencies Disclosure [Line Items]
Discounted environmental liability											42.6
Undiscounted environmental liability											45.9
Lower Passaic Cooperating Parties Group
Commitments and Contingencies Disclosure [Line Items]
Number of companies | Company										47
Property, Plant and Equipment, Other Types
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs, reserve											174.2	$ 213.8
Reserve for environmental remediation costs, current											46.7
Reserve for environmental remediation costs, noncurrent											127.5
Reserve for environmental loss contingencies, obligation after EPA funding											158.3
Estimated environmental remediation expense											24.7
Centredale Site
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs, reserve													$ 77.7
Environmental remediation costs deemed probable and reasonable estimable											$ 74.2
Minimum
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs deemed probable and reasonable estimable	$ 420.0
Environmental liability discount rate											0.10%
Minimum | Property, Plant and Equipment, Other Types
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs deemed probable and reasonable estimable											$ 102.9
Maximum
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs deemed probable and reasonable estimable	$ 468.0
Environmental liability discount rate											1.80%
Maximum | Property, Plant and Equipment, Other Types
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation costs deemed probable and reasonable estimable											$ 245.3
Cargo and Freight
Commitments and Contingencies Disclosure [Line Items]
Outstanding obligations											$ 50.8