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Derivative Financial Instruments (Tables) | 9 Months Ended
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Jan. 26, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The foreign currency exchange contracts in aggregated notional amounts in place to exchange United States Dollars at January 26, 2013 and April 28, 2012 were as follows:
| January 26, 2013 |  | April 28, 2012
| U.S. Dollars |  | Foreign Currency |  | U.S. Dollars |  | Foreign Currency
Foreign Currency Exchange Forward Contracts: |  |  |  |  |  |  |
U.S. Dollars/Australian Dollars | 6,496 |  |  | 6,329 |  |  | 3,315 |  |  | 3,269 |
U.S. Dollars/Canadian Dollars | 492 |  |  | 492 |  |  | 870 |  |  | 868 |
U.S. Dollars/British Pounds | 244 |  |  | 151 |  |  | — |  |  | — |
U.S. Dollars/Singapore Dollars | — |  |  | — |  |  | 96 |  |  | 121 |
U.S. Dollars/Brazilian Reais | — |  |  | — |  |  | 242 |  |  | 436 |
U.S. Dollars/Euros | — |  |  | — |  |  | 130 |  |  | 99 |

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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
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