Background and Basis of Presentation (Narrative) (Details) - USD ($)	Jun. 30, 2023	Jan. 31, 2023	Oct. 31, 2021	Jan. 31, 2021
Horizon [Member] | PM USA [Member]
Equity, Class of Treasury Stock [Line Items]
Ownership percentage in consolidated subsidiary	75.00%
Horizon [Member] | JTIUH [Member]
Equity, Class of Treasury Stock [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	25.00%
January 2021 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Planned share repurchase program			$ 3,500,000,000	$ 2,000,000,000
January 2023 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Planned share repurchase program		$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 528,000,000