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Derivative Financial Instruments and Hedging Activities 3 (Details) (USD $)
 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Jul. 27, 2011
Apr. 28, 2013
Apr. 29, 2012
Apr. 28, 2013
Foreign Exchange Contract [Member]
Apr. 29, 2012
Foreign Exchange Contract [Member]
Apr. 27, 2011
Foreign Exchange Contract [Member]
Jan. 25, 2012
U.S. Dollar Remarketable Securities due December 2020 [Member]
Apr. 28, 2013
Interest Rate Contract [Member]
Apr. 29, 2012
Interest Rate Contract [Member]
Apr. 27, 2011
Interest Rate Contract [Member]
Apr. 28, 2013
Interest Rate Swap [Member]
Jan. 27, 2013
Interest Rate Swap [Member]
U.S. Dollar Remarketable Securities due December 2020 [Member]
Jan. 25, 2012
Interest Rate Swap [Member]
U.S. Dollar Remarketable Securities due December 2020 [Member]
Apr. 28, 2013
Cross Currency Interest Rate Contract [Member]
Apr. 29, 2012
Cross Currency Interest Rate Contract [Member]
Apr. 27, 2011
Cross Currency Interest Rate Contract [Member]
Apr. 28, 2013
Foreign Exchange Contract [Member]
Apr. 29, 2012
Foreign Exchange Contract [Member]
Apr. 27, 2011
Foreign Exchange Contract [Member]
Apr. 28, 2013
Other Expense [Member]
Interest Rate Contract [Member]
Apr. 29, 2012
Other Expense [Member]
Interest Rate Contract [Member]
Apr. 27, 2011
Other Expense [Member]
Interest Rate Contract [Member]
Apr. 28, 2013
Other Expense [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 29, 2012
Other Expense [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 27, 2011
Other Expense [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 28, 2013
Other Expense [Member]
Foreign Exchange Contract [Member]
Apr. 29, 2012
Other Expense [Member]
Foreign Exchange Contract [Member]
Apr. 27, 2011
Other Expense [Member]
Foreign Exchange Contract [Member]
Apr. 28, 2013
Interest Income [Member]
Interest Rate Contract [Member]
Apr. 29, 2012
Interest Income [Member]
Interest Rate Contract [Member]
Apr. 27, 2011
Interest Income [Member]
Interest Rate Contract [Member]
Apr. 28, 2013
Interest Income [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 29, 2012
Interest Income [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 27, 2011
Interest Income [Member]
Cross Currency Interest Rate Contract [Member]
Apr. 28, 2013
Interest Income [Member]
Foreign Exchange Contract [Member]
Apr. 29, 2012
Interest Income [Member]
Foreign Exchange Contract [Member]
Apr. 27, 2011
Interest Income [Member]
Foreign Exchange Contract [Member]
Derivative [Line Items]                                                                          
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net               $ (1,193,000) $ 234,000 $ (51,476,000)       $ 0 $ 0 $ 0 $ (7,976,000) $ (2,183,000) $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ (7,976,000) $ (2,183,000) $ 3,351,000 $ (1,193,000) $ 234,000 $ (351,000) $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Notional Amount of Foreign Currency Derivatives   873,000,000 1,910,000,000                                                                    
Notional Amount of Interest Rate Derivatives   160,000,000 160,000,000                                                                    
Notional Amount of Cross Currency Interest Rate Swap   316,000,000 386,000,000                                                                    
Derivative, Fair Value, Net   11,000,000 74,800,000                                                                    
Cash Proceeds From Termination Of Foreign Currency Forward Contracts 11,600,000                                                                        
Hedge Accounting Adjustments Related To Debt Obligations   122,455,000 128,444,000                                                                    
Period of Hedging Forecasted Transactions   2 years                                                                      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months   (17,000,000)                                                                      
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments   369,900,000 445,500,000                                                                    
Unrealized Gain (Loss) related to Outstanding Nondesignated Derivative Instruments   (4,000,000) 3,100,000                                                                    
Derivative, Gain (Loss) on Derivative, Net       3,600,000 8,800,000 (16,900,000)                                                              
Derivative Instrument, Term                       3 years                                                  
Notional Amount of Interest Rate Derivative Instruments Not Designated as Hedging Instruments                         119,000,000                                                
Debt Instrument, Face Amount             119,000,000                                                            
Interest Income Earned on Total Rate of Return Swap                     (1,800,000)                                                    
Unrealized Gain Loss Related to Total Rate of Return Swap                     (1,000,000)                                                    
Cash Collateral for Borrowed Securities                     $ 34,100,000                                                    
Concentration Risk, Customer   .103