Document and Entity Information - USD ($)	12 Months Ended
	Feb. 02, 2019	Mar. 02, 2019	Aug. 04, 2018
Document Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Feb. 02, 2019
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	M
Entity Registrant Name	Macy's, Inc.
Entity Central Index Key	0000794367
Current Fiscal Year End Date	--02-02
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		307,800,430
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 11,956,587,132
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Voluntary Filers	No