Derivative Financial Instruments and Hedging Activities 1 (Details) (USD $) In Thousands, unless otherwise specified	Jul. 29, 2012	Apr. 29, 2012
Foreign Exchange Contract [Member]
Assets:
Total assets	$ 29,100	$ 30,547
Liabilities:
Total liabilities	12,952	12,619
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	28,894	25,506
Liabilities:
Total liabilities	5,166	10,667
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	23,382	17,318
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	5,512	8,188
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	5,166	10,653
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Liabilities [Member]
Liabilities:
Total liabilities	0	14
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Assets:
Total assets	206	5,041
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	206	5,041
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	7,786	1,952
Interest Rate Contract [Member]
Assets:
Total assets	41,305	36,478
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	40,878	36,244
Liabilities:
Total liabilities	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	6,856	6,851
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	34,022	29,393
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	427	234
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	427	234
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	0	0
Cross Currency Interest Rate Contract [Member]
Assets:
Total assets	10,760	23,196
Liabilities:
Total liabilities	4,852	2,760
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Assets:
Total assets	10,760	23,196
Liabilities:
Total liabilities	4,852	2,760
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Receivables, Net [Member]
Assets:
Total assets	0	18,222
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Non-Current Assets [Member]
Assets:
Total assets	10,760	4,974
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Payables [Member]
Liabilities:
Total liabilities	4,852	2,760
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
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