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Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 03, 2018 | Oct. 28, 2017 | Jul. 29, 2017 | Apr. 29, 2017 | Jan. 28, 2017 | Oct. 29, 2016 | Jul. 30, 2016 | Apr. 30, 2016 | Jul. 29, 2017 | Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016
Net sales | $ 8,666 | $ 5,281 | $ 5,552 | $ 5,338 | $ 8,515 | $ 5,626 | $ 5,866 | $ 5,771 |  | $ 24,837 | $ 25,778 | $ 27,079
Cost of sales | (5,358) | (3,175) | (3,313) | (3,306) | (5,251) | (3,386) | (3,468) | (3,516) |  | (15,152) | (15,621) | (16,496)
Gross margin | 3,308 | 2,106 | 2,239 | 2,032 | 3,264 | 2,240 | 2,398 | 2,255 |  | 9,685 | 10,157 | 10,583
Selling, general and administrative expenses | (2,279) | (1,995) | (1,977) | (1,880) | (2,335) | (2,112) | (2,047) | (1,980) |  | (8,131) | (8,474) | (8,468)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | 368 | 65 | 43 | 68 | 133 | 41 | 21 | 14 |  | 544 | 209 | 212
Restructuring Costs and Asset Impairment Charges | (152) | (33) | 0 | 0 | (230) | 0 | (249) | 0 |  | (186) | (479) | (288)
Settlement charges | (32) | (22) | (51) | 0 | (17) | (62) | (6) | (13) |  | (105) | (98) | 0
Operating income (loss) |  |  |  |  |  |  |  |  |  | 1,807 | 1,315 | 2,039
Interest (expense) income, net |  |  |  |  |  |  |  |  |  |  |  |
External |  |  |  |  |  |  |  |  |  | (310) | (363) | (361)
Intercompany |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Premium on early retirement of debt | 11 |  |  |  |  |  |  |  | $ (1) | 10 | 0 | 0
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  | 1,507 | 952 | 1,678
Federal, state and local income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 29 | (341) | (608)
Net income (loss) |  |  |  |  |  |  |  |  |  | 1,536 | 611 | 1,070
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 11 | 8 | 2
Net income attributable to Macy's, Inc. shareholders | $ 1,325 | $ 36 | $ 116 | $ 71 | $ 475 | $ 17 | $ 11 | $ 116 |  | 1,547 | 619 | 1,072
Comprehensive income |  |  |  |  |  |  |  |  |  | 1,708 | 758 | 1,099
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 11 | 8 | 2
Comprehensive income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 1,719 | 766 | 1,101
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Cost of sales |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gross margin |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 0 | (2) | (2)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Settlement charges |  |  |  |  |  |  |  |  |  | 0 | 0 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 0 | (2) | (2)
Interest (expense) income, net |  |  |  |  |  |  |  |  |  |  |  |
External |  |  |  |  |  |  |  |  |  | 0 | 2 | 1
Intercompany |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Premium on early retirement of debt |  |  |  |  |  |  |  |  |  | 0 |  |
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  | 1,555 | 619 | 1,072
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  | 1,555 | 619 | 1,071
Federal, state and local income tax benefit (expense) |  |  |  |  |  |  |  |  |  | (8) | 0 | 1
Net income (loss) |  |  |  |  |  |  |  |  |  | 1,547 | 619 | 1,072
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 1,547 | 619 | 1,072
Comprehensive income |  |  |  |  |  |  |  |  |  | 1,719 | 766 | 1,101
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 1,719 | 766 | 1,101
Subsidiary Issuer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 9,441 | 10,677 | 11,959
Cost of sales |  |  |  |  |  |  |  |  |  | (6,101) | (6,787) | (7,670)
Gross margin |  |  |  |  |  |  |  |  |  | 3,340 | 3,890 | 4,289
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (3,386) | (3,834) | (4,090)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property |  |  |  |  |  |  |  |  |  | 201 | 95 | 110
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  |  | (40) | (295) | (170)
Settlement charges |  |  |  |  |  |  |  |  |  | (35) | (34) |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 80 | (178) | 139
Interest (expense) income, net |  |  |  |  |  |  |  |  |  |  |  |
External |  |  |  |  |  |  |  |  |  | (313) | (366) | (361)
Intercompany |  |  |  |  |  |  |  |  |  | (139) | (200) | (230)
Premium on early retirement of debt |  |  |  |  |  |  |  |  |  | 10 |  |
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  | 767 | 255 | 421
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  | 405 | (489) | (31)
Federal, state and local income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 350 | 281 | 120
Net income (loss) |  |  |  |  |  |  |  |  |  | 755 | (208) | 89
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 755 | (208) | 89
Comprehensive income |  |  |  |  |  |  |  |  |  | 915 | (61) | 118
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 915 | (61) | 118
Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 23,264 | 23,436 | 24,037
Cost of sales |  |  |  |  |  |  |  |  |  | (16,919) | (17,169) | (17,743)
Gross margin |  |  |  |  |  |  |  |  |  | 6,345 | 6,267 | 6,294
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (4,745) | (4,638) | (4,376)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property |  |  |  |  |  |  |  |  |  | 343 | 114 | 102
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  |  | (146) | (184) | (118)
Settlement charges |  |  |  |  |  |  |  |  |  | (70) | (64) |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 1,727 | 1,495 | 1,902
Interest (expense) income, net |  |  |  |  |  |  |  |  |  |  |  |
External |  |  |  |  |  |  |  |  |  | 3 | 1 | (1)
Intercompany |  |  |  |  |  |  |  |  |  | 139 | 200 | 230
Premium on early retirement of debt |  |  |  |  |  |  |  |  |  | 0 |  |
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  | 1,869 | 1,696 | 2,131
Federal, state and local income tax benefit (expense) |  |  |  |  |  |  |  |  |  | (313) | (622) | (729)
Net income (loss) |  |  |  |  |  |  |  |  |  | 1,556 | 1,074 | 1,402
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 11 | 8 | 2
Net income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 1,567 | 1,082 | 1,404
Comprehensive income |  |  |  |  |  |  |  |  |  | 1,668 | 1,153 | 1,415
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 11 | 8 | 2
Comprehensive income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | 1,679 | 1,161 | 1,417
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | (7,868) | (8,335) | (8,917)
Cost of sales |  |  |  |  |  |  |  |  |  | 7,868 | 8,335 | 8,917
Gross margin |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Restructuring Costs and Asset Impairment Charges |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Settlement charges |  |  |  |  |  |  |  |  |  | 0 | 0 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest (expense) income, net |  |  |  |  |  |  |  |  |  |  |  |
External |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intercompany |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Premium on early retirement of debt |  |  |  |  |  |  |  |  |  | 0 |  |
Equity in earnings of subsidiaries |  |  |  |  |  |  |  |  |  | (2,322) | (874) | (1,493)
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  | (2,322) | (874) | (1,493)
Federal, state and local income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | (2,322) | (874) | (1,493)
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | (2,322) | (874) | (1,493)
Comprehensive income |  |  |  |  |  |  |  |  |  | (2,594) | (1,100) | (1,535)
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income attributable to Macy's, Inc. shareholders |  |  |  |  |  |  |  |  |  | $ (2,594) | $ (1,100) | $ (1,535)

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