Contingencies (Schedule of Pending Cases) (Details) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 23, 2023 claim case lawsuit	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2023 USD ($)	May 31, 2023 lawsuit	Dec. 31, 2022 USD ($)	Oct. 24, 2022 claim	Jun. 30, 2022 USD ($)	Oct. 25, 2021 claim
Loss Contingencies [Line Items]
Pre-tax charge | $		$ 373	$ 55	$ 373	$ 55	$ 91	$ 381		$ 71		$ 25
Payments | $		(31)	(13)	(122)	(137)
Loss contingency accrual, provision | $						$ 90
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending										161		179
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending										1		1
E-vapor Litigation [Member]
Loss Contingencies [Line Items]
Number of cases pending										4,351		2,951
Loss Contingency, Number Of Patent Infringement Lawsuits | lawsuit								3
Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending										3		3
Tobacco and Health Judgment [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision | $		23	21	75	71
Agreement To Resolve Shareholder Class Action | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision | $		$ 0	$ 20	$ 98	$ 27
Subsequent Event [Member]
Loss Contingencies [Line Items]
Loss contingency, class action lawsuit | lawsuit	17
Subsequent Event [Member] | Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending	167
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Illinois [Member]
Loss Contingencies [Line Items]
Number of cases pending	15
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | New Mexico [Member]
Loss Contingencies [Line Items]
Number of cases pending	17
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of cases pending	53
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Florida [Member]
Loss Contingencies [Line Items]
Number of cases pending	46
Subsequent Event [Member] | ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of cases | case	1,386
Subsequent Event [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending	1
Subsequent Event [Member] | E-vapor Litigation [Member]
Loss Contingencies [Line Items]
Number of cases pending	5,177
Loss contingency, class action lawsuit | lawsuit	57
Subsequent Event [Member] | E-vapor Litigation [Member] | Pending Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of cases pending	3,614
Subsequent Event [Member] | E-vapor Litigation [Member] | Pending Lawsuits Filed By State Or Local Governments [Member]
Loss Contingencies [Line Items]
Number of cases pending	1,506
Subsequent Event [Member] | E-vapor Litigation [Member] | Class Action Lawsuit [Member]
Loss Contingencies [Line Items]
Number of cases pending	57
Number of pending claims, consolidated for pre-trial purposes	32
Subsequent Event [Member] | Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending	3
Loss contingency, number of inactive cases | case	1
Loss contingency, number of inactive class action lawsuits | case	2