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Segment Reporting (Narrative) (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
segment
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Segment Reporting Information [Line Items]            
Number of operating segments | segment       6    
Net revenues       $ 31,405 $ 28,694 $ 29,805
Operating Segments            
Segment Reporting Information [Line Items]            
Net revenues       31,405 28,694 29,805
Long-lived assets       8,507 8,482 8,288
Operating Segments | East Asia & Australia            
Segment Reporting Information [Line Items]            
Net revenues       5,953 5,429 5,364
Long-lived assets       740 807 829
Operating Segments | European Union            
Segment Reporting Information [Line Items]            
Net revenues       12,275 10,702 9,817
Long-lived assets       4,504 4,500 4,275
Marketing, administration and research costs            
Segment Reporting Information [Line Items]            
Deconsolidation, gain (loss) amount           (239)
Indonesia | Operating Segments            
Segment Reporting Information [Line Items]            
Long-lived assets       900 700 800
Eastern Europe | The Moscow Tax Inspectorate for Major Taxpayers Audit | Other Litigation            
Segment Reporting Information [Line Items]            
Amount of pre-tax charge related to alleged underpayment of excise taxes and VAT claimed by tax authority, including penalties and interest   $ 374        
Canada | Cecilia Letourneau & Conseil Quebecois Sur La Tabac Et La Sante and Jean-Yves Blais Cases | Smoking and Health Class Actions | RBH | Appellate Ruling            
Segment Reporting Information [Line Items]            
Amount of litigation charge     $ 194     194
Italy | Operating Segments            
Segment Reporting Information [Line Items]            
Long-lived assets       900 1,100 1,100
Switzerland | Operating Segments            
Segment Reporting Information [Line Items]            
Long-lived assets       1,300 1,300 1,100
Brazil            
Segment Reporting Information [Line Items]            
Tax credit related to overpayment $ 119          
Tax credit related to overpayment, pending amount       90    
SAUDI ARABIA | Middle East & Africa            
Segment Reporting Information [Line Items]            
Net revenues       (246)    
Geographic Concentration Risk | Japan            
Segment Reporting Information [Line Items]            
Net revenues       $ 4,600 $ 4,100 $ 3,900
Customer Concentration Risk | Customer One | Net Revenues | East Asia & Australia            
Segment Reporting Information [Line Items]            
Concentration risk percentage       15.00% 14.00% 13.00%
Customer Concentration Risk | Customer One | Net Revenues | European Union            
Segment Reporting Information [Line Items]            
Concentration risk percentage       13.00% 11.00% 10.00%