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