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Share-Based Compensation Unrecognized Compensation Expense and Period for Recognition (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended |
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Nov. 02, 2013
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Stock Options [Member]
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| Unrecognized Compensation Expense and Period for Recognition [Line Items] | |
| Unrecognized Share-based Compensation Expense | $ 12.2 |
| Unrecognized Share-based Compensation Expense, Period for Recognition | 1 year 6 months |
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Restricted Stock Units (RSUs) [Member]
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| Unrecognized Compensation Expense and Period for Recognition [Line Items] | |
| Unrecognized Share-based Compensation Expense | $ 18.8 |
| Unrecognized Share-based Compensation Expense, Period for Recognition | 1 year 8 months |