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CONTINGENCIES - Additional Information (Detail) cubic_yard in Millions, $ in Millions |  |  |  |  |  |  |  |  | 1 Months Ended | 6 Months Ended |  |
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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 ($) Company mi | Mar. 04, 2016 cubic_yard mi | Apr. 11, 2014 mi | Apr. 30, 2015 mi | May 31, 2007 Company mi | Jun. 27, 2020 USD ($) site | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($)
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 |  |  |  |  |  |  |
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 | $ 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 |  |  |  |  |  |  |  |  |  |  | $ 204.4 | $ 213.8 |
Reserve for environmental remediation costs, current |  |  |  |  |  |  |  |  |  |  | 60.9 |  |
Reserve for environmental remediation costs, noncurrent |  |  |  |  |  |  |  |  |  |  | 143.5 |  |
Accrual for environmental loss contingencies, EPA funded amount |  |  |  |  |  |  |  |  |  |  | 15.8 |  |
Accrual for environmental loss contingencies, obligation after EPA funding |  |  |  |  |  |  |  |  |  |  | 188.6 |  |
Property, Plant and Equipment, Other Types | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental remediation costs deemed probable and reasonably estimable |  |  |  |  |  |  |  |  |  |  | 137.9 |  |
Property, Plant and Equipment, Other Types | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental remediation costs deemed probable and reasonably estimable |  |  |  |  |  |  |  |  |  |  | 277.4 |  |
Centredale Site |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental remediation costs, reserve |  |  |  |  |  |  |  |  |  |  |  |  | $ 77.7
Environmental remediation costs deemed probable and reasonably estimable |  |  |  |  |  |  |  |  |  |  | $ 106.4 |  |
Kerr McGee Chemical Site |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental remediation costs, reserve |  |  |  |  |  |  |  |  |  |  |  |  | 25.1
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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