Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended	216 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Sep. 30, 2022	Oct. 24, 2022
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 25	$ 0	$ 91	$ 9	$ 9
Loss contingency accrual, provision					90
Payments	(13)	(8)	(137)	(60)
Accrued liability for tobacco and health litigation items at end of period	55	97	55	97	$ 91	$ 55
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	2	6	3	6
Assets [Member] | Pending Litigation [Member] | PM USA [Member] | Subsequent Event [Member]
Loss Contingency Accrual [Roll Forward]
Security posted for appeal of judgments							$ 42
Tobacco and Health Judgment [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)						941
Litigation settlement interest expense (income)						230
Tobacco and Health Judgment [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	$ 41	$ 99	$ 98	$ 142
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)						432
Litigation settlement interest expense (income)						$ 59