Net Gain on Disposition of Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Long Lived Assets Held-for-sale [Line Items]
Net gain on disposition of assets	$ 0	$ 11	$ 2
Disposition of assets	$ 1	14	$ 3
Paper mill at Augusta (Georgia) | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Long Lived Assets Held-for-sale [Line Items]
Net gain on disposition of assets		9
Consideration received from disposition of assets		10
Paper mill at Thorold (Ontario) | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Long Lived Assets Held-for-sale [Line Items]
Net gain on disposition of assets		2
Disposition of assets		4
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Long Lived Assets Held-for-sale [Line Items]
Net gain on disposition of assets		$ 11