|
Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended |
|---|---|---|
|
Aug. 03, 2013
|
Aug. 03, 2013
|
|
| Income Taxes [Line Items] | ||
| Decrease in unrecognized tax benefits | $ 8.5 | $ 17.9 |