Earnings (Loss) Per Share (Computation Of Basic and Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Jan. 30, 2021	Oct. 31, 2020	Aug. 01, 2020	May 02, 2020	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to Macy's, Inc. Shareholders and average number of shares outstanding	$ 160	$ (91)	$ (431)	$ (3,581)	$ 340	$ 2	$ 86	$ 136	$ (3,944)	$ 564	$ 1,108
Net Income (Loss) Available to Common Stockholders, Basic									$ (3,944)	$ 564	$ 1,108
Basic earnings (loss) per share attributable to Macy's, Inc. shareholders	$ 0.51	$ (0.29)	$ (1.39)	$ (11.53)	$ 1.10	$ 0.01	$ 0.28	$ 0.44	$ (12.68)	$ 1.82	$ 3.60
Net Income (Loss) Available to Common Stockholders, Diluted									$ (3,944)	$ 564	$ 1,108
Diluted earnings (loss) per share attributable to Macy's, Inc. shareholders	$ 0.50	$ (0.29)	$ (1.39)	$ (11.53)	$ 1.09	$ 0.01	$ 0.28	$ 0.44	$ (12.68)	$ 1.81	$ 3.56
Weighted Average Number of Shares Issued, Basic									310.2	308.8	306.8
Shares to be issued under deferred compensation and other plans									1.0	0.9	0.9
Average number of shares outstanding, basic									311.1	309.7	307.7
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements										1.7	3.7
Average number of shares outstanding, diluted									311.1	311.4	311.4