Closure Costs, Impairment and Other Related Charges - Summary (Details) - USD ($) $ in Millions		12 Months Ended			24 Months Ended
	Dec. 16, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Impairment of assets		$ 124
Accelerated depreciation			$ 38
Severance and other costs	$ 13	20	15
Total		144	53	$ 18
Write-off of other assets	5
Expected decommissioning costs in 2022		32			$ 32
Pulp and Paper mill at Calhoun (Tennessee)
Restructuring Cost and Reserve [Line Items]
Impairment of assets	$ 124	124
Severance and other costs		18
Total		142
Paper mill at Amos (Quebec)
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation			12
Severance and other costs			5
Total			17
Additional provisions for severance and other costs		8			$ 17
Paper mill at Baie-Comeau (Quebec)
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation			26
Severance and other costs			12
Total			38
Other
Restructuring Cost and Reserve [Line Items]
Impairment of assets		0
Accelerated depreciation			0
Severance and other costs		2	(2)
Total		$ 2	$ (2)
Paper mill at Augusta (Georgia)
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation				8
Severance and other costs				10		$ 4
Total				$ 18