Document and Entity Information - USD ($)	12 Months Ended
	Jan. 28, 2017	Feb. 24, 2017	Jul. 30, 2016
Document Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 28, 2017
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Trading Symbol	M
Entity Registrant Name	Macy's, Inc.
Entity Central Index Key	0000794367
Current Fiscal Year End Date	--01-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		304,258,647
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 11,052,402,000
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No