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PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Fair Value Measurements of Plan Assets (Details) - Pension Benefits - USD ($) $ in Thousands | Dec. 29, 2024 | Dec. 31, 2023 | Dec. 25, 2022
--- | --- | --- | ---
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | $ 123,926 | $ 225,451 | $ 210,133
Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 26,479 | 5,394 |
Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 97,447 | 220,057 |
Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
All Pension Plans | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 26,479 | 5,394 |
All Pension Plans | Cash and cash equivalents | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 26,479 | 5,394 |
All Pension Plans | Cash and cash equivalents | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
All Pension Plans | Cash and cash equivalents | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Large U.S. equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 2,123 |
PSAs for the Union Plan | Large U.S. equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Large U.S. equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 2,123 |
PSAs for the Union Plan | Large U.S. equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Small/Mid U.S. equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 1,133 |
PSAs for the Union Plan | Small/Mid U.S. equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Small/Mid U.S. equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 1,133 |
PSAs for the Union Plan | Small/Mid U.S. equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | International equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 1,654 |
PSAs for the Union Plan | International equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | International equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 1,654 |
PSAs for the Union Plan | International equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Fixed income funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 70 | 3,640 |
PSAs for the Union Plan | Fixed income funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Fixed income funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 70 | 3,640 |
PSAs for the Union Plan | Fixed income funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Real estate |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 437 |
PSAs for the Union Plan | Real estate | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Union Plan | Real estate | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 437 |
PSAs for the Union Plan | Real estate | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Large U.S. equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 27,516 |
PSAs and CCTs for the GK Pension Plan | Large U.S. equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Large U.S. equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 27,516 |
PSAs and CCTs for the GK Pension Plan | Large U.S. equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Small/Mid U.S. equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 13,991 |
PSAs and CCTs for the GK Pension Plan | Small/Mid U.S. equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Small/Mid U.S. equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 13,991 |
PSAs and CCTs for the GK Pension Plan | Small/Mid U.S. equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | International equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 13,751 |
PSAs and CCTs for the GK Pension Plan | International equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | International equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 13,751 |
PSAs and CCTs for the GK Pension Plan | International equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Fixed income funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 3,152 | 34,111 |
PSAs and CCTs for the GK Pension Plan | Fixed income funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Fixed income funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 3,152 | 34,111 |
PSAs and CCTs for the GK Pension Plan | Fixed income funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Real estate |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 5,174 |
PSAs and CCTs for the GK Pension Plan | Real estate | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs and CCTs for the GK Pension Plan | Real estate | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 5,174 |
PSAs and CCTs for the GK Pension Plan | Real estate | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Large U.S. equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 11,761 | 29,648 |
PSAs for the Europe Plans | Large U.S. equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Large U.S. equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 11,761 | 29,648 |
PSAs for the Europe Plans | Large U.S. equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | International equity funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 25,575 | 36,507 |
PSAs for the Europe Plans | International equity funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | International equity funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 25,575 | 36,507 |
PSAs for the Europe Plans | International equity funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Fixed income funds |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 29,715 | 3,376 |
PSAs for the Europe Plans | Fixed income funds | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Fixed income funds | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 29,715 | 3,376 |
PSAs for the Europe Plans | Fixed income funds | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Real estate |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 15,442 | 14,985 |
PSAs for the Europe Plans | Real estate | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Real estate | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 15,442 | 14,985 |
PSAs for the Europe Plans | Real estate | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Liability driven investments |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 11,732 | 32,011 |
PSAs for the Europe Plans | Liability driven investments | Level 1 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
PSAs for the Europe Plans | Liability driven investments | Level 2 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | 11,732 | 32,011 |
PSAs for the Europe Plans | Liability driven investments | Level 3 |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Fair value of plan assets | $ 0 | $ 0 |

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