RESTRUCTURING CHARGES - Additional Information (Details) T in Thousands, $ in Millions		1 Months Ended		12 Months Ended
	Feb. 08, 2021 T	Jul. 31, 2020 employee T	Jun. 30, 2019 position T	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Closure of Duluth Mill
Restructuring Cost and Reserve [Line Items]
Reduction in production capacity | T		270
Number of positions eliminated | employee		190
Number of positions remained | employee		35
Accelerated depreciation | $				$ 84	$ 65
Closure of Luke Mill
Restructuring Cost and Reserve [Line Items]
Reduction in production capacity | T			450
Number of positions eliminated | position			675
Accelerated depreciation | $						$ 76
Closure of No. 14 Paper Machine and Certain Other Long-Lived Assets
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation | $				$ 84
Decrease in Production Capacity | T	185