Properties and Leases - Lease Liability Maturity (Details) - USD ($) $ in Millions	Feb. 01, 2025	Feb. 03, 2024
Finance Leases
2024	$ 3
2026	3
2027	3
2028	2
2029	2
After 2029	10
Total undiscounted lease payments	23
Less amount representing interest	8
Total lease liabilities	15
Operating Leases
2024	365
2026	388
2027	369
2028	349
2029	321
After 2029	4,535
Total undiscounted lease payments	6,327
Less amount representing interest	3,048
Total lease liabilities	3,279
Total
2024	368
2026	391
2027	372
2028	351
2029	323
After 2029	4,545
Total undiscounted lease payments	6,350
Less amount representing interest	3,056
Total lease liabilities	3,294	$ 3,344
Lessee, operating lease, option to extend, reasonably certain	2,552
Lessee, operating lease, lease not yet commenced, liability incurred	40
Operating lease, payment, non-lease component	955
Operating lease, payment, non-lease component, option to extend, reasonably certain	$ 659

Entire Lease Liabilities, Payments Due [Abstract]

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- Definition

Lease, Liability

+ References

No definition available.

+ Details

Name:	m_LeaseLiability
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- Definition

Lease, Liability, Payments Due, (Finance and Operating)

+ References

No definition available.

+ Details

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- Definition

Lease, Liability, Payments, Due After Year Five, (Finance and Operating)

+ References

No definition available.

+ Details

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- Definition

Lease, Liability, Payments, Due Next Twelve Months, (Finance and Operating)

+ References

No definition available.

+ Details

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- Definition

Lease, Liability, Payments, Due Year Five, (Finance and Operating)

+ References

No definition available.

+ Details

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- Definition

Lease, Liability, Payments, Due Year Four, (Finance and Operating)

+ References

No definition available.

+ Details

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- Definition

Lease, Liability, Payments, Due Year Three, (Finance and Operating)

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Lease, Liability, Payments, Due Year Two, (Finance and Operating)

+ References

No definition available.

+ Details

Name:	m_LeaseLiabilityPaymentsDueYearTwo
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lease, Liability, Undiscounted Excess Amount, (Finance and Operating)

+ References

No definition available.

+ Details

Name:	m_LeaseLiabilityUndiscountedExcessAmount
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- Definition

Lessee, Operating Lease, Lease Not Yet Commenced, Liability Incurred

+ References

No definition available.

+ Details

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- Definition

Lessee, Operating Lease, Option to Extend Reasonably Certain

+ References

No definition available.

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- Definition

Operating Lease, Payment, Non-Lease Component

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Operating Lease, Payment, Non-Lease Component, Option to Extend, Reasonably Certain

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- References

No definition available.

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Name:	us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

Name:	us-gaap_FinanceLeaseLiability
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for finance lease.

+ References

+ Details

Name:	us-gaap_FinanceLeaseLiabilityPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive
Namespace Prefix:	us-gaap_
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- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive
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- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
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- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

+ References

+ Details

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease.

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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Balance Type:	credit
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- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

+ References

+ Details

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- References

No definition available.

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

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