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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483359/720-20-50-1

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 27
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482395/460-10-55-27

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

+ Details

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

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-10

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

Name:	us-gaap_LossContingencyDamagesAwardedValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Damages Suspended, Value

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyDamagesSuspendedValue
Namespace Prefix:	wmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Number Of Current And Former Employees Who Brought Claims

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyNumberOfCurrentAndFormerEmployeesWhoBroughtClaims
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Number Of Former Employees Who Brought Complaints

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyNumberOfFormerEmployeesWhoBroughtComplaints
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Number Of Phases

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyNumberOfPhases
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Number Of Phases Complete

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyNumberOfPhasesComplete
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Period to Maintain Certain Practices And Obligations

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyPeriodToMaintainCertainPracticesAndObligations
Namespace Prefix:	wmt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Types Of Supplier Contributions

+ References

No definition available.

+ Details

Name:	wmt_LossContingencyTypesOfSupplierContributions
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Cases Brought By Hospitals

+ References

No definition available.

+ Details

Name:	wmt_NumberOfCasesBroughtByHospitals
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Cases Brought By Third-Party Payers

+ References

No definition available.

+ Details

Name:	wmt_NumberOfCasesBroughtByThirdPartyPayers
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Putative Class Actions

+ References

No definition available.

+ Details

Name:	wmt_NumberOfPutativeClassActions
Namespace Prefix:	wmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_LitigationCaseAxis=wmt_CanadaOpioidsClassActionComplaintsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=wmt_AsdaEqualValueClaimsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=wmt_MexicoAntitrustMatterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=wmt_DriverPlatformMattersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Contingencies (Details) employee in Thousands, $ in Millions, $ in Millions	Mar. 03, 2026 USD ($)	Dec. 12, 2024 USD ($) supplierContribution	Dec. 12, 2024 MXN ($) supplierContribution	Apr. 30, 2026 case employee phase classAction	Jan. 31, 2026 USD ($)	Jan. 09, 2025 pharmacist
Loss Contingencies [Line Items]
Number of cases brought by third-party payers \| case				4
Number of cases brought by hospitals \| case				1
Number of former employees who brought complaints \| pharmacist						2
Number of phases \| phase				3
Number of phases complete \| phase				2
Canada Opioids Class Action Complaints
Loss Contingencies [Line Items]
Number of putative class actions \| classAction				2
Asda Equal Value Claims
Loss Contingencies [Line Items]
Number of current and former employees who brought claims \| employee				73
Mexico Antitrust Matter \| Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages awarded, value		$ 5	$ 93.4
Types of supplier contributions \| supplierContribution		2	2
Driver Platform Matters
Loss Contingencies [Line Items]
Loss contingency, damages awarded, value	$ 100
Period to maintain certain practices and obligations	10 years
Damages suspended	$ 63
Loss contingency, accrued liabilities					$ 37