Commitments and Contingencies Loss Contingencies (Details) $ in Millions		12 Months Ended
	Mar. 29, 2018 USD ($)	Dec. 31, 2021 USD ($) defendant facility entity number_of_companies affiliate_corporations	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Insurance Recoveries		$ 3
Ebina Waste Disposal Percentage; Low Concentration		68.00%
Ebina Waste Disposal Percentage; High Concentration		44.00%
Fox River Site [Member]
Loss Contingencies [Line Items]
Portion Of Costs Below Threshold, Percentage		45.00%
Portion Of Costs Exceeding Threshold, Percentage		40.00%
Fox River Site [Member]
Loss Contingencies [Line Items]
Number of Potentially Responsible Parties | entity		8
Number of Previously Owned Carbonless Copy Paper Manufacturing Facilities | facility		2
Threshold For Environmental Cleanup Costs		$ 75
BAT And API Funding Obligation Under The Cost Sharing Agreement		50.00%
BAT And API Obligation Under The Cost Sharing Agreement		60.00%
Receivable under Funding Agreement		$ 54	$ 54
Gross Loss Contingency Accrual		4	6
Net Loss Contingency Accrual		26	28
Total Amount Received from Settlements with Insurance Carriers			205
General Contractor Arbitration [Member] | Fox River Site [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		10
General Contractor Arbitration [Member] | Fox River Site [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		46
General Contractor Arbitration [Member] | Fox River Site [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 53
Kalamazoo River Site [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value Removed by Court	$ 55
Loss Contingency, Damages Sought, Value	$ 105
Additional Companies Receiving General Notice Letters | number_of_companies		3
Total Additional Defendants | defendant		2
Total Corporation Plaintiffs | affiliate_corporations		3
Total Past Costs Being Tried		$ 50
Loss Contingency Accrual		99	164
Ebina [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		16	20
Fox River LLC [Member] | Fox River Site [Member]
Loss Contingencies [Line Items]
Funding Remainder Other Current Asset		0	$ 0
Kalamazoo River Site [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Anticipated contribution from co-obligors and indemnitors		70
Kalamazoo River Site [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Anticipated contribution from co-obligors and indemnitors		$ 150