| Document and Entity Information Document | Dec. 11, 2019 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 11, 2019 |
| Emerging growth company | false |
| Entity Registrant Name | MACY'S, INC. |
| Entity Central Index Key | 0000794367 |
| Entity File Number | 1-13536 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 13-3324058 |
| Entity Address, Address Line One | 7 West Seventh Street |
| Entity Address, City or Town | Cincinnati |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45202 |
| City Area Code | 513 |
| Local Phone Number | 579-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $.01 par value per share |
| Trading Symbol | M |
| Security Exchange Name | NYSE |
| Other Address [Member] | |
| Entity Address, Address Line One | 151 West 34th Street |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10001 |
| City Area Code | 212 |
| Local Phone Number | 494-1602 |
