Share-Based Compensation (Restricted Stock Units Activity) (Details) - $ / shares | 9 Months Ended |
Oct. 29, 2016 | Oct. 31, 2015 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Target percentage of equity awards earned | 100.00% | |
Service-based restricted stock units | | |
Restricted Stock Unit Activity, Number of Underlying Shares | | |
Number of Underlying Shares, Beginning Balance at January 30, 2016 | 1,671,597 | |
Number of Underlying Shares, Granted | 1,119,848 | |
Number of Underlying Shares, Adjustments for performance achievement | 0 | |
Number of Underlying Shares, Vested | (603,789) | |
Number of Underlying Shares, Forfeited | (236,871) | |
Number of Underlying Shares, Ending Balance at October 29, 2016 | 1,950,785 | |
Restricted Stock Unit Activity, Weighted-Average Grant Date Fair Value | | |
Weighted-Average Grant Date Fair Value, Beginning Balance at January 30, 2016 | $ 28.13 | |
Weighted-Average Grant Date Fair Value, Granted | 25.28 | |
Weighted-Average Grant Date Fair Value, Adjustments for performance achievement | 0 | |
Weighted-Average Grant Date Fair Value, Vested | 30.37 | |
Weighted-Average Grant Date Fair Value, Forfeited | 26.75 | |
Weighted-Average Grant Date Fair Value, Ending Balance at October 29, 2016 | $ 25.97 | |
Performance-based restricted stock units [Member] | | |
Restricted Stock Unit Activity, Number of Underlying Shares | | |
Number of Underlying Shares, Beginning Balance at January 30, 2016 | 185,500 | |
Number of Underlying Shares, Granted | 129,725 | |
Number of Underlying Shares, Adjustments for performance achievement | 0 | |
Number of Underlying Shares, Vested | (32,625) | |
Number of Underlying Shares, Forfeited | (78,677) | |
Number of Underlying Shares, Ending Balance at October 29, 2016 | 203,923 | |
Restricted Stock Unit Activity, Weighted-Average Grant Date Fair Value | | |
Weighted-Average Grant Date Fair Value, Beginning Balance at January 30, 2016 | $ 23.42 | |
Weighted-Average Grant Date Fair Value, Granted | 25.70 | |
Weighted-Average Grant Date Fair Value, Adjustments for performance achievement | 0 | |
Weighted-Average Grant Date Fair Value, Vested | 36.12 | |
Weighted-Average Grant Date Fair Value, Forfeited | 24.22 | |
Weighted-Average Grant Date Fair Value, Ending Balance at October 29, 2016 | $ 22.53 | |
Market-based restricted stock units [Member] | | |
Restricted Stock Unit Activity, Number of Underlying Shares | | |
Number of Underlying Shares, Beginning Balance at January 30, 2016 | 117,711 | |
Number of Underlying Shares, Granted | 129,734 | |
Number of Underlying Shares, Adjustments for performance achievement | 0 | |
Number of Underlying Shares, Vested | 0 | |
Number of Underlying Shares, Forfeited | (62,553) | |
Number of Underlying Shares, Ending Balance at October 29, 2016 | 184,892 | |
Restricted Stock Unit Activity, Weighted-Average Grant Date Fair Value | | |
Weighted-Average Grant Date Fair Value, Beginning Balance at January 30, 2016 | $ 25 | |
Weighted-Average Grant Date Fair Value, Granted | 31.01 | $ 19.04 |
Weighted-Average Grant Date Fair Value, Adjustments for performance achievement | 0 | |
Weighted-Average Grant Date Fair Value, Vested | 0 | |
Weighted-Average Grant Date Fair Value, Forfeited | 31.91 | |
Weighted-Average Grant Date Fair Value, Ending Balance at October 29, 2016 | $ 26.89 | |
Minimum | Performance-based restricted stock units [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Target percentage of equity awards earned | 0.00% | |
Minimum | Market-based restricted stock units [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Target percentage of equity awards earned | 0.00% | |
Maximum | Performance-based restricted stock units [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Target percentage of equity awards earned | 200.00% | |
Maximum | Market-based restricted stock units [Member] | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | |
Target percentage of equity awards earned | 200.00% | |