Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	12 Months Ended			231 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health and certain other litigation items at beginning of period	$ 71	$ 91	$ 9
Provision related to litigation recorded			90
Payments	(155)	(151)	(100)
Accrued liability for tobacco and health and certain other litigation items at end of period	346	71	91	$ 346
Agreement To Resolve Shareholder Class Action [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	98	27	90
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	11	3	9
Tobacco and Health Judgment [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				1,000
Litigation settlement interest (approximately)				241
Tobacco and Health Judgment [Member] | Tobacco and Health Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	79	101	83
JUUL [Member] | Tobacco and Health Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	242	$ 0	$ 0
Engle Progeny Cases [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				440
Litigation settlement interest (approximately)				60
Pending Litigation [Member] | PM USA [Member] | Assets [Member]
Loss Contingency Accrual [Roll Forward]
Security posted for appeal of judgments	$ 35			$ 35