Segment Reporting Information by Net Revenue and Operating Profit (Detail) $ in Millions	3 Months Ended	8 Months Ended
Sep. 07, 2019 USD ($)	Sep. 08, 2018 USD ($)	Sep. 07, 2019 USD ($) segment	Sep. 08, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments \| segment			6
Net Revenue	$ 17,188	$ 16,485	$ 46,521	$ 45,137
Operating Profit	2,855	2,844	$ 7,592	7,679
Disaggregation of Net Revenue - Beverages			50.00%
Disaggregation of Net Revenue - Food/Snack			50.00%
Disaggregation of beverage revenue from company-owned bottlers			40.00%
Gain (Loss) on Disposition of Business				144
Frito Lay North America [Member]
Segment Reporting Information [Line Items]
Net Revenue	4,105	3,891	$ 11,930	11,345
Operating Profit	1,286	1,241	3,694	3,491
Quaker Foods North America [Member]
Segment Reporting Information [Line Items]
Net Revenue	576	567	1,710	1,695
Operating Profit	126	143	391	443
PepsiCo Beverages North America [Member]
Segment Reporting Information [Line Items]
Net Revenue	5,643	5,456	15,475	15,064
Operating Profit	640	703	1,719	1,838
Latin America [Member]
Segment Reporting Information [Line Items]
Net Revenue	1,904	1,868	5,031	4,935
Operating Profit	277	284	785	742
Europe Sub-Saharan Africa [Member]
Segment Reporting Information [Line Items]
Net Revenue	3,347	3,161	8,173	7,945
Operating Profit	474	439	$ 965	995
Disaggregation of Net Revenue - Beverages			50.00%
Disaggregation of Net Revenue - Food/Snack			50.00%
Asia, Middle East and North Africa [Member]
Segment Reporting Information [Line Items]
Net Revenue	1,613	1,542	$ 4,202	4,153
Operating Profit	357	311	$ 883	994
Disaggregation of Net Revenue - Beverages			35.00%
Disaggregation of Net Revenue - Food/Snack			65.00%
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Profit	3,160	3,121	$ 8,437	8,503
Corporate Unallocated [Member]
Segment Reporting Information [Line Items]
Operating Profit	$ (305)	$ (277)	$ (845)	$ (824)
United States and Canada [Member]
Segment Reporting Information [Line Items]
Fiscal Period Duration	84 days

Disaggregation of Net Revenue - Beverages

No definition available.

Name:	pep_DisaggregationofNetRevenueBeverages
Namespace Prefix:	pep_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Disaggregation of Net Revenue - Food/Snack

+ References

No definition available.

+ Details

Name:	pep_DisaggregationofNetRevenueFoodSnack
Namespace Prefix:	pep_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Disaggregation of beverage revenue from Company-owned bottlers

+ References

No definition available.

+ Details

Name:	pep_Disaggregationofbeveragerevenuefromcompanyownedbottlers
Namespace Prefix:	pep_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

+ References

No definition available.

+ Details

Name:	us-gaap_FiscalPeriodDuration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684

+ Details

Name:	us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pep_FritoLayNorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pep_QuakerFoodsNorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pep_PepsiCoBeveragesNorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=srt_LatinAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pep_EuropeSubSaharanAfricaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=pep_AsiaMiddleEastandNorthAfricaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=pep_UnitedStatesandCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: