Contingencies (Smoking And Health Litigation) (Details)							1 Months Ended				6 Months Ended
	Mar. 01, 2019 USD ($)	Mar. 01, 2019 CAD ($)	May 27, 2015 USD ($) manufacturer plaintiff	May 27, 2015 CAD ($) manufacturer plaintiff	Jun. 20, 2012 cigarette	Jul. 10, 2009 cigarette	Oct. 30, 2015 USD ($)	Oct. 30, 2015 CAD ($)	Apr. 30, 2004 USD ($)	Apr. 30, 2004 BRL (R$)	Jun. 30, 2019 USD ($)	Jul. 23, 2019 litigation_case	Jul. 24, 2018 litigation_case	Jul. 25, 2017 litigation_case
Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases [Member] | Appellate Ruling [Member] | RBH [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Amount of litigation charge | $											$ 194,000,000
Brazil [Member] | The Smoker Health Defense Association (ADESF) [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Smoking and health loss contingency interest rate									1.00%	1.00%
Brazil [Member] | The Smoker Health Defense Association (ADESF) [Member] | Award per smoker per year [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Damages awarded									$ 267	R$ 1,000
Canada [Member] | Cecilia Letourneau [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Number of additional manufacturers found liable | manufacturer			2	2
Court-estimated number of members in class | plaintiff			918,000	918,000
Canada [Member] | Cecilia Letourneau [Member] | Judicial Ruling [Member] | Imperial Tobacco Ltd., Rothmans, Benson And Hedges Inc., And JTI Macdonald Corp. [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Punitive damages awarded			$ 100,100,000	$ 131,000,000
Canada [Member] | Cecilia Letourneau [Member] | Judicial Ruling [Member] | RBH [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Punitive damages awarded			$ 35,200,000	$ 46,000,000
Punitive damages awarded including interest	$ 43,600,000	$ 57,000,000
Payment period for awarded punitive damages to be deposited into trust			60 days	60 days
Canada [Member] | Conseil Quebecois Sur Le Tabac Et La Sante and Jean-Yves Blais [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Number of additional manufacturers found liable | manufacturer			2	2
Court-estimated number of members in class | plaintiff			99,957	99,957
Canada [Member] | Conseil Quebecois Sur Le Tabac Et La Sante and Jean-Yves Blais [Member] | Judicial Ruling [Member] | Imperial Tobacco Ltd., Rothmans, Benson And Hedges Inc., And JTI Macdonald Corp. [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Punitive damages awarded			$ 68,780	$ 90,000
Compensatory damages awarded			11,800,000,000	15,500,000,000
Damages awarded, reduced amount	10,300,000,000	13,500,000,000
Canada [Member] | Conseil Quebecois Sur Le Tabac Et La Sante and Jean-Yves Blais [Member] | Judicial Ruling [Member] | RBH [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Punitive damages awarded			22,930	30,000
Compensatory damages awarded	$ 2,060,000,000.00	$ 2,700,000,000	$ 2,370,000,000	$ 3,100,000,000
Damages allocated to subsidiary (percent)	20.00%	20.00%	20.00%	20.00%
Canada [Member] | Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases [Member] | Judicial Ruling [Member] | Imperial Tobacco Ltd., Rothmans, Benson And Hedges Inc., And JTI Macdonald Corp. [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Damages awarded that are to be deposited into trust	$ 840,700,000	$ 1,100,000,000
Payment period for amount to be deposited into trust	60 days	60 days
Canada [Member] | Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases [Member] | Appellate Ruling [Member] | RBH [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Amount of security ordered to be furnished and paid							$ 172,700,000	$ 226,000,000
Amount of security ordered, funded by defendant	$ 196,400,000	$ 257,000,000
Amount of litigation charge | $											194,000,000
Amount of litigation charge net of tax | $											$ 142,000,000
Canada [Member] | Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases [Member] | Appellate Ruling [Member] | Imperial Tobacco Ltd. [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency, Motion for Security Ordered by Appeals Court							$ 579,300,000	$ 758,000,000
Canada [Member] | Adams [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Plaintiff requirement, Minimum number of cigarettes smoked | cigarette						25,000
Canada [Member] | Suzanne Jacklin [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Plaintiff requirement, Minimum number of cigarettes smoked | cigarette					25,000
Combustible Products [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM													65	68
Combustible Products [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Cases brought against PM													11	11
Combustible Products [Member] | Subsequent Event [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												52
Combustible Products [Member] | Subsequent Event [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Cases brought against PM												10
Combustible Products [Member] | Subsequent Event [Member] | Argentina [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												32
Combustible Products [Member] | Subsequent Event [Member] | Brazil [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												7
Combustible Products [Member] | Subsequent Event [Member] | Brazil [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1
Combustible Products [Member] | Subsequent Event [Member] | Canada [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												2
Combustible Products [Member] | Subsequent Event [Member] | Canada [Member] | Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Cases brought against PM												9
Combustible Products [Member] | Subsequent Event [Member] | Chile [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												4
Combustible Products [Member] | Subsequent Event [Member] | Costa Rica [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1
Combustible Products [Member] | Subsequent Event [Member] | Italy [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1
Combustible Products [Member] | Subsequent Event [Member] | Philippines [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1
Combustible Products [Member] | Subsequent Event [Member] | Poland [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												2
Combustible Products [Member] | Subsequent Event [Member] | Turkey [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1
Combustible Products [Member] | Subsequent Event [Member] | Scotland [Member] | Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Cases brought against PM												1