Fair Value Disclosures (Other Financial Instruments) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Apr. 29, 2017 |
Jan. 28, 2017 |
Apr. 30, 2016 |
|
| Fair Value Disclosures [Abstract] | |||
| Total debt, excluding unamortized debt issuance costs, capital leases, financing obligation and note payable, Fair Value | $ 4,222 | $ 4,495 | $ 4,488 |
| Total debt, excluding unamortized debt issuance costs, capital leases, financing obligation and note payable, carrying amount | 4,435 | 4,665 | 4,764 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value of long-lived assets impaired, fair value disclosure | 86 | ||
| Asset Impairment Charges | 77 | ||
| Fair Value, Inputs, Level 2 [Member] | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Derivative Liability | 13 | $ 12 | $ 31 |
| Assets, Fair Value Disclosure, Nonrecurring | $ 9 |