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Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 04, 2018 USD ($) stores Rate | Jul. 29, 2017 USD ($) Rate | Aug. 04, 2018 USD ($) stores Rate | Jul. 29, 2017 USD ($) Rate | Feb. 03, 2018 USD ($) | Jan. 28, 2017 USD ($)
sales by product category | $ 5,572 | $ 5,636 | $ 11,112 | $ 10,986 |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 164 |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  |  |  | $ 72 | $ 54
Revenue Recognition, Sales Returns, Reserve for Sales Returns | $ 243 | $ 231 | $ 243 | $ 231 | 291 |
Macy's sales to total Company sales | Rate | 89.00% | 89.00% | 88.00% | 89.00% |  |
Number of states in which entity operates | 44 |  | 44 |  |  |
Contract with Customer, Liability | $ 48 | $ 61 | $ 48 | $ 61 | 73 |
Contract with Customer, Right to Recover Product | 165 | 159 | 165 | 159 | 201 |
Gift Card Liability, Current | 614 | 596 | 614 | 596 | 821 |
Restricted Cash and Cash Equivalents | $ 41 | 40 | $ 41 | 40 | $ 58 | $ 37
Premiums paid on early retirement of debt |  |  |  | 10 |  |
Minimum [Member] |  |  |  |  |  |
Number of Stores | stores | 860 |  | 860 |  |  |
Women's Accessories, Intimate Apparel, Shoes and Cosmetics [Member] |  |  |  |  |  |
sales by product category | $ 2,046 | 2,064 | $ 4,211 | 4,133 |  |
Women's Apparel [Member] |  |  |  |  |  |
sales by product category | 1,351 | 1,409 | 2,705 | 2,742 |  |
Men's and Children's [Member] |  |  |  |  |  |
sales by product category | 1,284 | 1,259 | 2,459 | 2,375 |  |
Home and Miscellaneous [Member] |  |  |  |  |  |
sales by product category | $ 891 | $ 904 | $ 1,737 | $ 1,736 |  |

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