Significant Accounting Policies (Advertising) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 28, 2017 |
Jan. 30, 2016 |
Jan. 31, 2015 |
|
| Accounting Policies [Abstract] | |||
| Cooperative advertising vendor reimbursements | $ 26 | $ 32 | $ 1 |
| Advertising costs | $ 769 | $ 792 | $ 886 |