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CONTINGENCIES - Additional Information (Detail) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 01, 2017 USD ($) | Dec. 28, 2019 USD ($) sites | Dec. 29, 2018 USD ($) | Jun. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Superfund Sites | sites |  | 28 |  |
Reserve for environmental remediation costs |  | $ 57.8 | $ 58.1 |
Reserve for environmental loss contingencies, EPA funded amount |  | $ 15.6 |  |
Environmental remediation. Period construction of treatment facility to be maintained |  | 30 years |  |
Undiscounted environmental liability expected to be paid 2013 |  | $ 1.4 |  |
Accrual for Environmental Loss Contingencies, Undiscounted, Second Year |  | 3.0 |  |
Undiscounted environmental liability expected to be paid in 2015 |  | 3.0 |  |
Undiscounted environmental liability expected to be paid in 2016 |  | 3.0 |  |
Undiscounted environmental liability expected to be paid in 2017 |  | 3.1 |  |
Undiscounted environmental liability expected to be paid thereafter |  | 33.6 |  |
Leased Sites |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Discounted environmental liability |  | 40.8 |  |
Undiscounted environmental liability |  | 47.1 |  |
Property, Plant and Equipment, Other Types |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Environmental Remediation Expense | $ 26.3 |  |  |
Reserve for environmental remediation costs |  | 213.8 | $ 246.6 |
Reserve for environmental remediation costs, current |  | 57.8 |  |
Reserve for environmental remediation costs, noncurrent |  | 156.0 |  |
Reserve for environmental loss contingencies, obligation after EPA funding |  | 198.2 |  |
Centredale Site [Member] |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Reserve for environmental remediation costs |  |  |  | $ 77.7
Environmental Exit Costs, Anticipated Cost |  | $ 113.8 |  |
Minimum |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Environmental liability discount rate |  | 1.60% |  |
Minimum | Property, Plant and Equipment, Other Types |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Environmental Exit Costs, Anticipated Cost |  | $ 149.1 |  |
Maximum [Member] |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Environmental liability discount rate |  | 2.30% |  |
Maximum [Member] | Property, Plant and Equipment, Other Types |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Environmental Exit Costs, Anticipated Cost |  | $ 286.1 |  |
Cargo and Freight [Member] |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Loss Contingency Accrual |  | $ 50.8 |  |

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