| Schedule of Derivative Liabilities at Fair Value [Table Text Block] |
Information regarding the gross amounts of our derivative instruments in the unaudited Interim Consolidated Balance Sheets is as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Asset Derivatives at Fair Value | | Liability Derivatives at Fair Value | ($ in millions) | Balance Sheet Location | | August 4, 2018 | | July 29, 2017 | | February 3, 2018 | | Balance Sheet Location | | August 4, 2018 | | July 29, 2017 | | February 3, 2018 | Derivatives designated as hedging instruments: | | | | | | | | | | | | | | | | Interest rate swaps | Prepaid expenses and other | | $ | 1 |
| | $ | — |
| | $ | — |
| | Other accounts payable and accrued expenses | | $ | — |
| | $ | 2 |
| | $ | 1 |
| Interest rate swaps | Other assets | | 16 |
| | — |
| | 9 |
| | Other liabilities | | — |
| | 13 |
| | — |
| Total derivatives designated as hedging instruments | | | $ | 17 |
| | $ | — |
| | $ | 9 |
| | | | $ | — |
| | $ | 15 |
| | $ | 1 |
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