Commitments and Contingencies Loss Contingencies (Details) R$ in Millions, $ in Millions		12 Months Ended
	Mar. 29, 2018 USD ($)	Dec. 31, 2019 USD ($) defendant affiliate_corporations entity facility number_of_companies	Dec. 31, 2018 BRL (R$)	Dec. 31, 2018 USD ($)
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		$ 53		$ 45
Gross Loss Contingency Accrual		5		21
Net Loss Contingency Accrual		16		17
Total Amount Received from Settlements with Insurance Carriers		202
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
Net Loss Contingency Accrual		$ 81
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				47
Ebina [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		19		2
Fox River LLC [Member] | Fox River Site [Member]
Loss Contingencies [Line Items]
Funding Remainder Other Current Asset		0		0
BCG Matter [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		$ 80
Foreign Tax Authority [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value			R$ 168	$ 43