PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - NARRATIVE (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021 USD ($)	Sep. 27, 2020 USD ($)	Oct. 03, 2021 USD ($)	Sep. 27, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Remeasurement, Basis Spread on Discount Rate (Basis Points)			0.0039
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets			4.80%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 25,711	$ 748	$ 26,894	$ 1,753
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 3,527	$ 3,157	$ 11,682	$ 10,485