Income Taxes (Details) (USD $)	3 Months Ended
	Jul. 29, 2012	Jul. 27, 2011	Apr. 29, 2012
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 47,900,000		$ 52,700,000
Unrecognized tax benefits that would impact effective tax rate	34,400,000		38,900,000
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	22,300,000
Unrecognized tax benefits, interest on income taxes accrued	15,900,000		16,000,000
Unrecognized tax benefits, income tax penalties accrued	12,500,000		13,800,000
International sales percent	70.00%
Deferred Tax Liabilities [Abstract]
Tax benefit related to revaluation	(61,587,000)	(71,506,000)
Foreign income tax liability related to revaluation paid in Fiscal 2013	96,698,000		101,540,000	[1]
Effective tax rate	17.70%	23.30%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	(2.00%)	(2.00%)
Foreign Subsidiary [Member] | Assets Revaluation [Member]
Deferred Tax Liabilities [Abstract]
Increase (Decrease) in Deferred Tax Assets	82,100,000
Tax benefit related to revaluation	(12,900,000)
Deferred Income Tax Liabilities	13,100,000
Foreign income tax liability related to revaluation paid in Fiscal 2013	18,000,000
Taxes Payable, Due in Year Two	16,000,000
Taxes Payable, Due in Year Three	4,000,000
Cash Taxes, Tax Amortization Period	20 years
Total improvement to cash flow from operations related to revaluation	$ 25,800,000

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.