Background and Basis of Presentation (Narrative) (Details)	1 Months Ended	3 Months Ended			9 Months Ended
	Aug. 31, 2023 $ / shares	Sep. 30, 2023 USD ($) $ / shares	Jun. 30, 2023 $ / shares	Sep. 30, 2022 $ / shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 $ / shares	Jan. 31, 2023 USD ($)	Oct. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)
Equity, Class of Treasury Stock [Line Items]
Common Stock Dividend Increase Percentage	0.043
Common Stock, Dividends, Per Share, Declared | $ / shares	$ 0.98	$ 0.98	$ 0.94	$ 0.94	$ 2.86	$ 2.74
Common Stock, Dividend Rate, Annual Per Share | $ / shares		$ 3.92			$ 3.92
Horizon [Member] | PM USA [Member]
Equity, Class of Treasury Stock [Line Items]
Ownership percentage in consolidated subsidiary		75.00%			75.00%
Horizon [Member] | JTIUH [Member]
Equity, Class of Treasury Stock [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners		25.00%			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		$ 268,000,000			$ 268,000,000