Income Tax 3 (Details)	12 Months Ended
Apr. 27, 2011	Apr. 28, 2010	Apr. 29, 2009
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
Tax on income of foreign subsidiaries	(5.30%)	(3.50%)	(4.10%)
State income taxes (net of federal benefit)	0.30%	0.30%	0.60%
Earnings repatriation	3.30%	1.20%	0.40%
Tax free interest	(4.20%)	(4.60%)	(2.50%)
Effects of revaluation of tax basis of foreign assets	(1.60%)	(0.50%)	(0.70%)
Other	(0.70%)	(0.10%)	(0.30%)
Effective tax rate	26.80%	27.80%	28.40%

Effective Income Tax Rate Reconciliation, Effects of revaluation of tax basis of foreign assets.

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- Definition

Effective Income Tax Rate Reconciliation, Tax Free Interest.

+ Details

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Subparagraph 2
-Article 4

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

+ Details

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the repatriation of foreign earnings under enacted tax laws.

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.

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