Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended		225 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 171	$ 0	$ 71	$ 91	$ 91
Loss contingency accrual, provision						$ 90
Payments	(80)	(21)	(91)	(124)
Accrued liability for tobacco and health litigation items at end of period	381	25	381	25	$ 71	$ 91	$ 381
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	10	1	11	1
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 (approximately)							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	40	38	52	50
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)							438
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	7	98	7
JUUL-related settlements [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	$ 240	$ 0	$ 240	$ 0