Derivative Financial Instruments and Hedging Activities 1 (Details) (USD $) In Thousands	Apr. 27, 2011	Apr. 28, 2010
Foreign Exchange Contract [Member]
Derivatives designated as hedging instruments:
Other receivables, net	$ 28,139	$ 7,408
Other non-current assets	7,913	16,604
Total derivative asset designated as hedging instrument	36,052	24,012
Derivatives not designated as hedging instruments:
Other receivables, net	9,329	555
Other non-current assets	0	0
Total derivative asset not designated as hedging instrument	9,329	555
Total assets	45,381	24,567
Derivatives designated as hedging instruments:
Other payables	27,804	16,672
Other non-current liabilities	8,054	4,279
Total derivative liability designated as hedging instrument	35,858	20,951
Derivatives not designated as hedging instruments:
Other payables	1,024	3,153
Other non-current liabilities	0	0
Total derivative liability not designated as hedging instrument	1,024	3,153
Total liabilities	36,882	24,104
Interest Rate Contract [Member]
Derivatives designated as hedging instruments:
Other receivables, net	38,703	70,746
Other non-current assets	16,723	38,460
Total derivative asset designated as hedging instrument	55,426	109,206
Derivatives not designated as hedging instruments:
Other receivables, net	0	0
Other non-current assets	0	0
Total derivative asset not designated as hedging instrument	0	0
Total assets	55,426	109,206
Derivatives designated as hedging instruments:
Other payables	0	0
Other non-current liabilities	0	0
Total derivative liability designated as hedging instrument	0	0
Derivatives not designated as hedging instruments:
Other payables	0	0
Other non-current liabilities	0	0
Total derivative liability not designated as hedging instrument	0	0
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member]
Derivatives designated as hedging instruments:
Other receivables, net	0	0
Other non-current assets	14,898	0
Total derivative asset designated as hedging instrument	14,898	0
Derivatives not designated as hedging instruments:
Other receivables, net	0	0
Other non-current assets	0	0
Total derivative asset not designated as hedging instrument	0	0
Total assets	14,898	0
Derivatives designated as hedging instruments:
Other payables	6,125	3,510
Other non-current liabilities	0	8,422
Total derivative liability designated as hedging instrument	6,125	11,932
Derivatives not designated as hedging instruments:
Other payables	0	0
Other non-current liabilities	0	0
Total derivative liability not designated as hedging instrument	0	0
Total liabilities	$ 6,125	$ 11,932