|
Investments And Restricted Investments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
Apr. 28, 2012
|
Apr. 30, 2011
|
|---|---|---|
| Investment [Line Items] | ||
| Underlying assets in non-qualified deferred compensation program | $ 75.3 | $ 72.7 |
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Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
|
||
| Investment [Line Items] | ||
| Underlying assets in non-qualified deferred compensation program | 63.8 | 62.9 |
|
Significant Other Observable Inputs (Level 2) [Member]
|
||
| Investment [Line Items] | ||
| Underlying assets in non-qualified deferred compensation program | $ 11.5 | $ 9.8 |