|
Goodwill And Other Intangible Assets, Net (Amortization Expense For Identified Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Jan. 27, 2012
|
Jan. 28, 2011
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Jan. 27, 2012
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Jan. 28, 2011
|
|
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Identified intangible assets | $ 21.6 | $ 3.4 | $ 67.6 | $ 13.3 |
|
Developed Technology [Member]
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||||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Identified intangible assets | 14.0 | 2.5 | 41.9 | 10.2 |
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Customer Contracts/Relationships [Member]
|
||||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Identified intangible assets | 6.4 | 0.6 | 21.8 | 2.2 |
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Trademarks And Trade Names [Member]
|
||||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Identified intangible assets | 1.0 | 0.3 | 3.3 | 0.9 |
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Covenant Not To Compete [Member]
|
||||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Identified intangible assets | $ 0.2 | $ 0 | $ 0.6 | $ 0 |