Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	12 Months Ended			255 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2025
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health and certain other litigation items at beginning of period	$ 96	$ 346	$ 71
Payments	(83)	(351)	(155)
Accrued liability for tobacco and health and certain other litigation items at end of period	71	96	346	$ 71
Agreement To Resolve Shareholder Class Action [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	0	0	98
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	3	1	11
Tobacco and Health Judgment [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				1,100
Litigation settlement interest (approximately)				245
Tobacco and Health Judgment [Member] | Tobacco and Health Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	55	70	79
JUUL [Member] | Tobacco and Health Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded	0	$ 30	$ 242
Engle Progeny Cases [Member]
Loss Contingency Accrual [Roll Forward]
Judgments paid (approximately)				453
Litigation settlement interest (approximately)				62
Pending Litigation [Member] | PM USA [Member] | Assets [Member]
Loss Contingency Accrual [Roll Forward]
Security posted for appeal of judgments	$ 18			$ 18