|
Share-Based Compensation Unrecognized Compensation Expense and Period for Recognition (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended |
|---|---|
|
Jul. 28, 2012
Years
|
|
|
Stock Options [Member]
|
|
| Unrecognized Compensation Expense and Period for Recognition [Line Items] | |
| Unrecognized Share-based Compensation Expense | $ 20.0 |
| Unrecognized Share-based Compensation Expense, Period for Recognition | 1.5 |
|
Restricted Stock Units (RSUs) [Member]
|
|
| Unrecognized Compensation Expense and Period for Recognition [Line Items] | |
| Unrecognized Share-based Compensation Expense | $ 23.9 |
| Unrecognized Share-based Compensation Expense, Period for Recognition | 1.8 |