Commitments and Contingencies - Loss Contingencies (Details) $ in Millions		9 Months Ended
	Mar. 29, 2018 USD ($) company	Sep. 30, 2020 USD ($) defendant facility number_of_companies entity party affiliate_corporations	Dec. 31, 2019 USD ($)	Aug. 22, 2017 party	Dec. 31, 2013 company	Nov. 13, 2007 entity
Loss Contingencies [Line Items]
Inventory, Net		$ 748	$ 784
Percentage of Company's award responsibility to indemnitors and co-obligators		25.00%
Ebina [Member]
Loss Contingencies [Line Items]
Loss contingency accrual		$ 20	19
Fox River
Loss Contingencies [Line Items]
Number of potentially responsible parties | entity		8				8
Number of previously owned carbonless copy paper manufacturing facilities | facility		2
Threshold amount for environmental cleanup costs			75
Percentage of funding obligation under cost sharing agreement		50.00%
Percentage of obligation under cost sharing agreement		60.00%
Receivable under funding agreement		$ 53	53
Number of defendants | defendant		2
Number of parties | party		2
Gross loss contingency accrual		$ 4	5
Net loss contingency accrual		$ 26	16
Total amount received from settlements with insurance carriers			202
Kalamazoo River
Loss Contingencies [Line Items]
Loss contingency, value of damages sought	$ 105
Number of additional companies receiving general notice letters | number_of_companies		3
Number of additional defendants | defendant		2
Number of total corporation plaintiffs | affiliate_corporations		3
Number of companies tried to the court | company					4
Costs incurred in the pasted related to loss contingency	50
Loss contingency, value of damages sought	$ 55
NCR share of costs related to loss contingency	40.00%
GP share of costs related to loss contingency	40.00%
Number of companies assigned to share costs of loss contingency | company	2
Loss contingency accrual		$ 78	81
Fox River LLC | Fox River
Loss Contingencies [Line Items]
Funding remainder		$ 0	0
Glatfelter | Fox River
Loss Contingencies [Line Items]
Number of parties that appealed | party				1
Company One | Kalamazoo River
Loss Contingencies [Line Items]
NCR share of costs related to loss contingency	15.00%
Company Two | Kalamazoo River
Loss Contingencies [Line Items]
NCR share of costs related to loss contingency	5.00%
Fox River
Loss Contingencies [Line Items]
Percentage of portion of costs below threshold		45.00%
Percentage of portion of costs exceeding threshold		40.00%
Fox River | General Contractor Arbitration [Member]
Loss Contingencies [Line Items]
Loss contingency, range of possible loss			10
Minimum | Fox River | General Contractor Arbitration [Member]
Loss Contingencies [Line Items]
Loss contingency, range of possible loss			46
Maximum | Fox River | General Contractor Arbitration [Member]
Loss Contingencies [Line Items]
Loss contingency, range of possible loss			$ 53
BCG Matter [Member]
Loss Contingencies [Line Items]
Loss contingency, value of damages sought		$ 80
Nashville Tornado [Member]
Loss Contingencies [Line Items]
Inventory, Net		748
Inventory Write-down		103
Inventory Requiring Further Assessment for Write-down		45
Insurance Recoveries		102
Incremental costs incurred in connection with natural disaster		11
Insurance proceeds for incremental expenses incurred		$ 8