Description of the Plan (Details) - EBP 013	12 Months Ended
Dec. 31, 2025 USD ($) h	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Requisite service period	1 year
Requisite service hours \| h	1,000
Participant compensation matched, percentage	6.00%	6.00%
Rollover contributions	$ 45,708,652
Forfeited nonvested account	$ 4,654,000	$ 2,504,000
Employee contribution vesting percentage	100.00%
Maximum borrowing, amount	$ 50,000
Maximum borrowing, to total account, percentage	50.00%
All loans, borrowing term	5 years
Pension Plan
EBP, Description of Plan [Line Items]
Rollover contributions	$ 38,454,559
EBP, Employer, Common Stock Fund
EBP, Description of Plan [Line Items]
Maximum contribution to eligible compensation, percentage	25.00%
First 1% of Basic Savings
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage	1.00%	1.00%
Matching percentage	100.00%	100.00%
Next 5% of Basic Savings
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage	5.00%	5.00%
Matching percentage	50.00%	50.00%
Employer Matching Contribution
EBP, Description of Plan [Line Items]
Vesting percentage	100.00%
Vesting period	2 years
Normal Retirement, Death or Disability
EBP, Description of Plan [Line Items]
Vesting percentage	100.00%
Minimum
EBP, Description of Plan [Line Items]
Maximum annual compensation to total compensation, percentage	1.00%
Maximum
EBP, Description of Plan [Line Items]
Maximum annual compensation to total compensation, percentage	50.00%

EBP, Employee Contribution Vesting Percentage

No definition available.

Name:	m_EBPEmployeeContributionVestingPercentage
Namespace Prefix:	m_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age

+ References

No definition available.

+ Details

Name:	m_EBPEmployerContributionVestingPercentage
Namespace Prefix:	m_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum Vesting service period for company contribution and/ or investment earning to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions.

+ References

No definition available.

+ Details

Name:	m_EBPEmployerContributionVestingServicePeriod
Namespace Prefix:	m_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, All Loans, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	m_EBPNoteReceivableFromParticipantAllLoansMaximumBorrowingTerm
Namespace Prefix:	m_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Maximum Annual Compensation to Total Compensation, Percentage

+ References

No definition available.

+ Details

Name:	m_EBPParticipantContributionMaximumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	m_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage

+ References

No definition available.

+ Details

Name:	m_EBPParticipantContributionMaximumContributionToEligibleCompensationPercentage
Namespace Prefix:	m_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Requisite Service Hours

+ References

No definition available.

+ Details

Name:	m_EBPRequisiteServiceHours
Namespace Prefix:	m_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Requisite Service Period

+ References

No definition available.

+ Details

Name:	m_EBPRequisiteServicePeriod
Namespace Prefix:	m_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in net asset available for benefit from contribution transferred from another qualified plan or from individual retirement account of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Excludes contribution for participant transmitted by employer of participant in EBP.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(4)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 4: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 5: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 50
-Paragraph 2B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477783/962-325-50-2B

Reference 6: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-7

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=m_EBP013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	m_EBPEmployerContributionTypeAxis=m_EBPFirst1OfBasicSavingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	m_EBPEmployerContributionTypeAxis=m_EBPNext5OfBasicSavingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	m_EBPEmployerContributionTypeAxis=m_EBPEmployerMatchingContributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	m_EBPEmployerContributionTypeAxis=m_EBPNormalRetirementDeathOrDisabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: