Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
May 01, 2021	May 02, 2020	Feb. 27, 2021	Jan. 30, 2021
Macy's sales to total Company sales	87.00%	87.00%
Percentage of digital sales	37.00%	43.00%
Contract with Customer, Refund Liability	$ 225	$ 184		$ 159
Contract with Customer, Right to Recover Product	136	130		103
Contract with Customer, Liability, Current	$ 580	$ 732		$ 616
Minimum [Member]
Sales decrease benchmark percentage	34.00%
Sales decrease percentage			34.00%

% of Macy's sales to entire Company sales

No definition available.

Name:	m_MacysSalesToEntireCompanySales
Namespace Prefix:	m_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of digital sales to net sales.

+ References

No definition available.

+ Details

Name:	m_PercentageOfDigitalSalesToNetSales
Namespace Prefix:	m_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sales decrease benchmark percentage under credit program agreement.

+ References

No definition available.

+ Details

Name:	m_SalesDecreaseBenchmarkPercentageUnderCreditProgramAgreement
Namespace Prefix:	m_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sales decrease percentage rolling twelve months under credit program agreement.

+ References

No definition available.

+ Details

Name:	m_SalesDecreasePercentageRollingTwelveMonthsUnderCreditProgramAgreement
Namespace Prefix:	m_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

+ Details

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

- Definition

Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 55
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=121551570&loc=SL49130611-203046-203046

+ Details

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

- Definition

Amount of right to recover product from customer on settling refund liability.

+ References

+ Details

Name:	us-gaap_ContractWithCustomerRightToRecoverProduct
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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