COMMITMENTS AND CONTINGENCIES (Details) € in Millions, $ in Millions		3 Months Ended			9 Months Ended
	Oct. 16, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2022	Sep. 30, 2019	Sep. 30, 2024 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)
Italian Competition Authority [Member]
Loss Contingencies [Line Items]
Potentially Responsible Parties				30
Loss Contingency Accrual							$ 31.0	€ 29
Loss Contingency Accrual, Period Increase (Decrease)		$ 6.0
San Jacinto River Superfund Site
Loss Contingencies [Line Items]
Responsible party percentage			50.00%
Secretariat of the Federal Revenue Bureau of Brazil [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		48.0			$ 48.0	$ 48.0
Income tax examination, estimate of possible loss		107.0			368.0
Income tax examination, penalties and interest expense					$ 261.0
Responsible party percentage-Sylvamo					40.00%
Responsible party percentage					60.00%
Shared Tax Assessment Payment		$ 300.0			$ 300.0
Secretariat of the Federal Revenue Bureau of Brazil [Member] | Subsequent Event
Loss Contingencies [Line Items]
Income tax examination, estimate of possible loss	$ 236.0