|
Other Intangible Assets Net - Amortization Expense for Identified Intangible Assets (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
|
|
| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization expense | $ 21.5 | $ 21.7 | $ 42.9 | $ 46.0 |
|
Developed Technology
|
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization expense | 14.0 | 14.0 | 27.9 | 27.9 |
|
Customer Contracts/Relationships
|
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization expense | 6.3 | 6.4 | 12.6 | 15.4 |
|
Trademarks And Trade Names
|
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization expense | 1.0 | 1.1 | 2.0 | 2.3 |
|
Covenants Not To Compete
|
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization expense | $ 0.2 | $ 0.2 | $ 0.4 | $ 0.4 |