Contingencies (Schedule of Pending Cases) (Details) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 27, 2023 case claim lawsuit	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 31, 2023 lawsuit	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 25, 2022 claim	Mar. 31, 2022 USD ($)	Jul. 26, 2021 claim
Loss Contingencies [Line Items]
Pre-tax charge | $		$ 381	$ 25	$ 381	$ 25	$ 91		$ 171	$ 71		$ 0
Payments | $		(80)	(21)	(91)	(124)
Loss contingency accrual, provision | $						$ 90
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending										162		169
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										4,030		2,626
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 | $		40	38	52	50
Agreement To Resolve Shareholder Class Action | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision | $		$ 0	$ 7	$ 98	$ 7
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	171
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Illinois [Member]
Loss Contingencies [Line Items]
Number of cases pending	18
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | New Mexico [Member]
Loss Contingencies [Line Items]
Number of cases pending	18
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of cases pending	52
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	1,390
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	5,326
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	3,736
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