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Investments in Equity Securities (Summary of Investments) (Details) - USD ($)
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Investments [Line Items]        
Total $ 9,600,000,000   $ 13,481,000,000  
ABI [Member]        
Investments [Line Items]        
Equity method investments 8,975,000,000   11,144,000,000 $ 11,200,000,000
JUUL [Member]        
Investments [Line Items]        
Equity securities, FV-NI 250,000,000   1,705,000,000  
Cronos [Member]        
Investments [Line Items]        
Equity method investments   $ 437,000,000 617,000,000  
Equity method investments including warrants and fixed price preemptive rights 375,000,000   632,000,000  
Equity method investments, fixed preemptive rights $ 0      
Common Stock [Member] | Cronos [Member]        
Investments [Line Items]        
Equity method investments including warrants and fixed price preemptive rights     $ 617,000,000