Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended		228 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 381	$ 25	$ 71	$ 91	$ 91
Loss contingency accrual, provision						$ 90
Payments	(31)	(13)	(122)	(137)
Accrued liability for tobacco and health litigation items at end of period	373	55	373	55	$ 71	$ 91	$ 373
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	0	2	11	3
Assets [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Security posted for appeal of judgments	34		34				34
Tobacco and Health Judgment [Member]
Loss Contingencies [Line Items]
Judgments paid							1,000
Litigation settlement interest expense (income)							241
Tobacco and Health Judgment [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	23	21	75	71
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Judgments paid							439
Litigation settlement interest expense (income)							$ 60
Agreement To Resolve Shareholder Class Action | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	0	20	98	27
JUUL-related settlements [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	$ 0	$ 0	$ 240	$ 0