|
Stockholders Equity - Stock-Based Compensation Expense Associated with each Type of Award (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Oct. 26, 2012
|
Oct. 28, 2011
|
Oct. 26, 2012
|
Oct. 28, 2011
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | $ 65.0 | $ 63.0 | $ 144.2 | $ 121.1 |
|
Stock Options
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | 11.7 | 14.7 | 23.7 | 29.2 |
|
Restricted Stock Units
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | 43.3 | 38.9 | 87.8 | 73.3 |
|
Employee Stock Purchase Plan
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | $ 10.0 | $ 9.4 | $ 32.7 | $ 18.6 |