|
Stockholders' Equity (Stock-Based Compensation Expense Associated With Each Type Of Award) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Jan. 27, 2012
|
Jan. 28, 2011
|
Jan. 27, 2012
|
Jan. 28, 2011
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | $ 76.7 | $ 45.0 | $ 197.8 | $ 127.0 |
|
Stock Options [Member]
|
||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | 13.8 | 13.8 | 43.0 | 39.7 |
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RSUs And Restricted Stock Awards [Member]
|
||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | 42.1 | 23.9 | 115.4 | 61.7 |
|
Employee Stock Purchase Plan [Member]
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock-based compensation expense | $ 20.8 | $ 7.3 | $ 39.4 | $ 25.6 |