Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017
Current Assets:
Cash and cash equivalents	$ 1,531	$ 1,455	$ 1,201
Receivables	250	363	345
Merchandise inventories	5,291	5,178	5,626
Prepaid expenses and other current assets	638	650	634
Total Current Assets	7,710	7,646	7,806
Property and Equipment - net	6,575	6,672	6,886
Goodwill	3,908	3,897	3,897
Other Intangible Assets - net	486	488	496
Other Assets	889	880	793
Deferred Income Taxes	0	0	0
Intercompany Receivable	0	0	0
Investment in Subsidiaries	0	0	0
Total Assets	19,568	19,583	19,878
Current Liabilities:
Short-term debt	25	22	313
Merchandise accounts payable	2,045	1,590	2,028
Accounts payable and accrued liabilities	2,695	3,271	3,042
Income taxes	312	296	355
Total Current Liabilities	5,077	5,179	5,738
Long-Term Debt	5,857	5,861	6,412
Intercompany Payable	0	0	0
Deferred Income Taxes	1,169	1,148	1,522
Other Liabilities	1,664	1,662	1,846
Shareholders' Equity, Macy's, Inc.	5,821	5,745	4,362
Shareholders' Equity, noncontrolling interest	(20)	(12)	(2)
Total Shareholders’ Equity	5,801	5,733	4,360
Total Liabilities and Shareholders' Equity	19,568	19,583	19,878
Parent
Current Assets:
Cash and cash equivalents	1,070	1,109	779
Receivables	0	0	0
Merchandise inventories	0	0	0
Prepaid expenses and other current assets	0	0	0
Total Current Assets	1,070	1,109	779
Property and Equipment - net	0	0	0
Goodwill	0	0	0
Other Intangible Assets - net	0	0	0
Other Assets	1	1	0
Deferred Income Taxes	5	11	24
Intercompany Receivable	1,156	884	902
Investment in Subsidiaries	3,975	4,032	3,063
Total Assets	6,207	6,037	4,768
Current Liabilities:
Short-term debt	0	0	0
Merchandise accounts payable	0	0	0
Accounts payable and accrued liabilities	109	159	22
Income taxes	253	113	317
Total Current Liabilities	362	272	339
Long-Term Debt	0	0	0
Intercompany Payable	0	0	0
Deferred Income Taxes	0	0	0
Other Liabilities	24	20	67
Shareholders' Equity, Macy's, Inc.	5,821	5,745	4,362
Shareholders' Equity, noncontrolling interest	0	0	0
Total Shareholders’ Equity	5,821	5,745	4,362
Total Liabilities and Shareholders' Equity	6,207	6,037	4,768
Subsidiary Issuer
Current Assets:
Cash and cash equivalents	79	58	99
Receivables	48	85	118
Merchandise inventories	2,283	2,344	2,560
Prepaid expenses and other current assets	150	165	150
Total Current Assets	2,560	2,652	2,927
Property and Equipment - net	3,298	3,349	3,479
Goodwill	3,326	3,315	3,315
Other Intangible Assets - net	43	44	49
Other Assets	96	89	45
Deferred Income Taxes	0	0	0
Intercompany Receivable	0	0	0
Investment in Subsidiaries	4,232	4,126	3,598
Total Assets	13,555	13,575	13,413
Current Liabilities:
Short-term debt	6	6	306
Merchandise accounts payable	896	653	841
Accounts payable and accrued liabilities	784	980	962
Income taxes	35	30	6
Total Current Liabilities	1,721	1,669	2,115
Long-Term Debt	5,841	5,844	6,395
Intercompany Payable	3,269	3,272	2,994
Deferred Income Taxes	570	559	733
Other Liabilities	416	430	498
Shareholders' Equity, Macy's, Inc.	1,738	1,801	678
Shareholders' Equity, noncontrolling interest	0	0	0
Total Shareholders’ Equity	1,738	1,801	678
Total Liabilities and Shareholders' Equity	13,555	13,575	13,413
Other Subsidiaries
Current Assets:
Cash and cash equivalents	382	288	323
Receivables	202	278	227
Merchandise inventories	3,008	2,834	3,066
Prepaid expenses and other current assets	488	485	484
Total Current Assets	4,080	3,885	4,100
Property and Equipment - net	3,277	3,323	3,407
Goodwill	582	582	582
Other Intangible Assets - net	443	444	447
Other Assets	792	790	748
Deferred Income Taxes	0	0	0
Intercompany Receivable	2,113	2,388	2,092
Investment in Subsidiaries	0	0	0
Total Assets	11,287	11,412	11,376
Current Liabilities:
Short-term debt	19	16	7
Merchandise accounts payable	1,149	937	1,187
Accounts payable and accrued liabilities	1,802	2,132	2,058
Income taxes	24	153	32
Total Current Liabilities	2,994	3,238	3,284
Long-Term Debt	16	17	17
Intercompany Payable	0	0	0
Deferred Income Taxes	604	600	813
Other Liabilities	1,224	1,212	1,281
Shareholders' Equity, Macy's, Inc.	6,469	6,357	5,983
Shareholders' Equity, noncontrolling interest	(20)	(12)	(2)
Total Shareholders’ Equity	6,449	6,345	5,981
Total Liabilities and Shareholders' Equity	11,287	11,412	11,376
Consolidation, Eliminations [Member]
Current Assets:
Cash and cash equivalents	0	0	0
Receivables	0	0	0
Merchandise inventories	0	0	0
Prepaid expenses and other current assets	0	0	0
Total Current Assets	0	0	0
Property and Equipment - net	0	0	0
Goodwill	0	0	0
Other Intangible Assets - net	0	0	0
Other Assets	0	0	0
Deferred Income Taxes	(5)	(11)	(24)
Intercompany Receivable	(3,269)	(3,272)	(2,994)
Investment in Subsidiaries	(8,207)	(8,158)	(6,661)
Total Assets	(11,481)	(11,441)	(9,679)
Current Liabilities:
Short-term debt	0	0	0
Merchandise accounts payable	0	0	0
Accounts payable and accrued liabilities	0	0	0
Income taxes	0	0	0
Total Current Liabilities	0	0	0
Long-Term Debt	0	0	0
Intercompany Payable	(3,269)	(3,272)	(2,994)
Deferred Income Taxes	(5)	(11)	(24)
Other Liabilities	0	0	0
Shareholders' Equity, Macy's, Inc.	(8,207)	(8,158)	(6,661)
Shareholders' Equity, noncontrolling interest	0	0	0
Total Shareholders’ Equity	(8,207)	(8,158)	(6,661)
Total Liabilities and Shareholders' Equity	$ (11,481)	$ (11,441)	$ (9,679)