Derivative Financial Instruments and Hedging Activities 1 (Details) (USD $) In Thousands	Oct. 26, 2011	Apr. 27, 2011
Foreign Exchange Contract [Member]
Assets:
Total assets	$ 15,756	$ 45,381
Liabilities:
Total liabilities	16,323	36,882
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	14,892	36,052
Liabilities:
Total liabilities	11,531	35,858
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	10,383	28,139
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	4,509	7,913
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	10,053	27,804
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	1,478	8,054
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Assets:
Total assets	864	9,329
Liabilities:
Total liabilities	4,792	1,024
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	864	9,329
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	0	0
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	4,792	1,024
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member]
Assets:
Total assets	44,816	55,426
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	44,816	55,426
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	16,158	38,703
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	28,658	16,723
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	0	0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	0	0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member]
Assets:
Total assets	42,003	14,898
Liabilities:
Total liabilities	2,627	6,125
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	42,003	14,898
Liabilities:
Total liabilities	2,627	6,125
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	27,065	0
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	14,938	14,898
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	2,627	6,125
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	0	0
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	0	0
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	$ 0	$ 0