Contingencies (Overview of Altria and/or PM USA Tobacco-Related Litigation Narrative) (Details)		265 Months Ended
	Jan. 25, 2021 claim case	Jan. 25, 2021 case claim	Dec. 31, 2020 claim	Dec. 31, 2019 claim	Dec. 31, 2018 claim
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim			1	1	1
Subsequent Event [Member] | Health Care Cost Recovery Actions [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim	3	3
Subsequent Event [Member] | PM USA [Member] | Health Care Cost Recovery Actions [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending	10	10
Subsequent Event [Member] | PM USA [Member] | Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Number of cases set for trial	1	1
Number of verdicts returned	134
Number of favorable verdicts	49
Number of unfavorable verdicts	76
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Number of verdicts returned		69
Number of favorable verdicts		44
Number of unfavorable verdicts		25
Number of claims resolved		20
Verdicts reversed, number		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Alaska [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | California [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		7
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Connecticut [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Florida [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		10
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Louisiana [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		4
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Mississippi [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Missouri [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		4
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | New Hampshire [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | New Jersey [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | New York [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		5
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Ohio [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		2
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Pennsylvania [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Rhode Island [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		1
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | Tennessee [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		2
Subsequent Event [Member] | PM USA [Member] | Non Engle Progeny Cases [Member] | West Virginia [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts		2
Subsequent Event [Member] | Philip Morris USA and Altria Group [Member] | Health Care Cost Recovery Actions [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending	8	8
Subsequent Event [Member] | Philip Morris USA and Altria Group [Member] | Smoking and Health Class Actions and Aggregated Claims Litigation [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending	7	7