Impact of New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Apr. 29, 2017 |
Apr. 30, 2016 |
|
| New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | ||
| Discrete tax benefit | $ 1.1 | $ 0.7 |
| Cumulative Effect on Retained Earnings, Tax | $ 0.4 | |