Contingencies (Judgments Paid and Provisions for Tobacco and Health Litigation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended	213 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Jun. 30, 2022	Jul. 25, 2022
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 0	$ 8	$ 91	$ 9	$ 9
Loss contingency accrual, provision					90
Payments	(21)	(16)	(124)	(52)
Accrued liability for tobacco and health litigation items at end of period	25	0	25	0	$ 91	$ 25
Related Interest Costs [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	1	0	1	0
Assets [Member] | Pending Litigation [Member] | PM USA [Member] | Subsequent Event [Member]
Loss Contingency Accrual [Roll Forward]
Security posted for appeal of judgments							$ 50
Tobacco and Health Judgment [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)						929
Litigation settlement interest expense (income)						228
Tobacco and Health Judgment [Member] | Tobacco and Health and Certain Other Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Loss contingency accrual, provision	$ 45	$ 8	$ 57	$ 43
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)						421
Litigation settlement interest expense (income)						$ 57