Contingencies (Overview of Altria and/or PM USA Tobacco-Related Litigation Narrative) (Details) - case		259 Months Ended
	Jul. 24, 2020	Jul. 24, 2020	Jul. 26, 2019	Jul. 23, 2018
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending			1	1
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending			90	97
Subsequent Event [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending	0	0
Subsequent Event [Member] | Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending	116	116
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	0	0
Number of verdicts returned	134
Number of favorable verdicts	48
Number of unfavorable verdicts	78
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
Number of verdicts reversed		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