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Investments in Equity Securities (Investment in Cronos Narrative) (Details)
shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
$ / shares
Sep. 30, 2022
USD ($)
Investments [Line Items]            
Fair value of investment           $ 11,200
Impairment of JUUL equity securities   $ 0 $ 0 $ 2,600    
Cronos [Member]            
Investments [Line Items]            
Equity method investment, ownership percentage (approximately)   41.10% 41.80%      
Equity method investment, number of shares owned, common (in shares) | shares   156.6        
Equity method investments $ 437   $ 617      
Fair value of investment $ 437   $ 617      
Equity method investment, difference between carrying amount and fair value, percentage (20.00%) 6.00% (25.00%)      
Equity method investment, difference between carrying amount and fair value   $ 22        
Equity method investment, impairment $ 107   $ 205      
Equity Contract, Preemptive Rights [Member] | Cronos [Member]            
Investments [Line Items]            
Equity method investment, price per share if exercised | $ / shares         $ 16.25  
Equity method investment, number of shares eligible for purchase | shares   7.0        
Equity Contract, Warrant [Member] | Cronos [Member]            
Investments [Line Items]            
Equity method investment, price per share if exercised | $ / shares         $ 19.00  
Equity method investment, percentage of shares eligible for purchase   10.00%