Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	12 Months Ended			219 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 91	$ 9	$ 14
Provision related to litigation recorded		90
Payments	(151)	(100)	(88)
Accrued liability for tobacco and health litigation items at end of period	71	91	9	$ 71
Agreement To Resolve Shareholder Class Action [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	27	90	0
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	3	9	4
Tobacco and Health Judgment [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				954
Litigation settlement interest (approximately)				230
Tobacco and Health Judgment [Member] | Tobacco and Health Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	101	$ 83	$ 79
Engle Progeny Cases [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				432
Litigation settlement interest (approximately)				59
Assets [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingency Accrual [Roll Forward]
Security posted for appeal of judgments	$ 46			$ 46