Defined Benefit Plan, Target Plan Asset Allocations.

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Direct cash holdings and institutional short term investment vehicles Abstract.

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- Definition

The percentage of the fair value of debt securities to the fair value of total plan assets held as of the measurement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(1)

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The percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(1)

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49

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The percentage of the fair value of investments other than debt securities, equity securities, and real estate to the fair value of total plan assets held as of the measurement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(1)

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The percentage of the fair value of real estate to the fair value of total plan assets held as of the measurement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(1)

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Target allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(2)

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Target allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

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Target allocation percentage in other than debt securities, equity securities, and real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

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Target allocation percentage of investments in real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

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The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(1)

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Pensions and Other Post-Retirement Benefits 7 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 27, 2011	Apr. 28, 2010	Apr. 27, 2011 Level 1 [Member]	Apr. 28, 2010 Level 1 [Member]	Apr. 27, 2011 Level 1 [Member] Equity Securities [Member]	Apr. 28, 2010 Level 1 [Member] Equity Securities [Member]	Apr. 27, 2011 Level 1 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 28, 2010 Level 1 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 27, 2011 Level 1 [Member] Fixed Income Securities [Member]	Apr. 28, 2010 Level 1 [Member] Fixed Income Securities [Member]	Apr. 27, 2011 Level 1 [Member] Other Investments [Member]	Apr. 28, 2010 Level 1 [Member] Other Investments [Member]	Apr. 27, 2011 Level 1 [Member] Cash and Cash Equivalents [Member]	Apr. 28, 2010 Level 1 [Member] Cash and Cash Equivalents [Member]	Apr. 27, 2011 Level 2 [Member]	Apr. 28, 2010 Level 2 [Member]	Apr. 27, 2011 Level 2 [Member] Equity Securities [Member]	Apr. 28, 2010 Level 2 [Member] Equity Securities [Member]	Apr. 27, 2011 Level 2 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 28, 2010 Level 2 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 27, 2011 Level 2 [Member] Fixed Income Securities [Member]	Apr. 28, 2010 Level 2 [Member] Fixed Income Securities [Member]	Apr. 27, 2011 Level 2 [Member] Other Investments [Member]	Apr. 28, 2010 Level 2 [Member] Other Investments [Member]	Apr. 27, 2011 Level 2 [Member] Cash and Cash Equivalents [Member]	Apr. 28, 2010 Level 2 [Member] Cash and Cash Equivalents [Member]	Apr. 27, 2011 Level 3 [Member]	Apr. 28, 2010 Level 3 [Member]	Apr. 29, 2009 Level 3 [Member]	Apr. 27, 2011 Level 3 [Member] Equity Securities [Member]	Apr. 28, 2010 Level 3 [Member] Equity Securities [Member]	Apr. 27, 2011 Level 3 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 28, 2010 Level 3 [Member] Equity Securities (mutual and pooled funds) [Member]	Apr. 27, 2011 Level 3 [Member] Fixed Income Securities [Member]	Apr. 28, 2010 Level 3 [Member] Fixed Income Securities [Member]	Apr. 29, 2009 Level 3 [Member] Fixed Income Securities [Member]	Apr. 27, 2011 Level 3 [Member] Other Investments [Member]	Apr. 28, 2010 Level 3 [Member] Other Investments [Member]	Apr. 29, 2009 Level 3 [Member] Other Investments [Member]	Apr. 27, 2011 Level 3 [Member] Cash and Cash Equivalents [Member]	Apr. 28, 2010 Level 3 [Member] Cash and Cash Equivalents [Member]	Apr. 27, 2011 Equity Securities [Member]	Apr. 28, 2010 Equity Securities [Member]	Apr. 27, 2011 Equity Securities (mutual and pooled funds) [Member]	Apr. 28, 2010 Equity Securities (mutual and pooled funds) [Member]	Apr. 27, 2011 Fixed Income Securities [Member]	Apr. 28, 2010 Fixed Income Securities [Member]	Apr. 27, 2011 Other Investments [Member]	Apr. 28, 2010 Other Investments [Member]	Apr. 27, 2011 Cash and Cash Equivalents [Member]	Apr. 28, 2010 Cash and Cash Equivalents [Member]
Direct cash holdings and institutional short term investment vehicles
Defined Benefit Plan, Fair Value of Plan Assets	$ 3,261,881	$ 2,869,971	$ 1,090,351	$ 1,081,648	$ 863,404	$ 894,684	$ 157,296	$ 122,753	$ 53,381	$ 49,951	$ 0	$ 0	$ 16,270	$ 14,260	$ 2,030,786	$ 1,744,108	$ 0	$ 0	$ 1,005,678	$ 641,727	$ 966,157	$ 785,924	$ 0	$ 7,491	$ 58,951	$ 308,966	$ 140,744	$ 44,215	$ 47,179	$ 0	$ 0	$ 0	$ 0	$ 9,649	$ 8,646	$ 8,873	$ 131,095	$ 35,569	$ 38,306	$ 0	$ 0	$ 863,404	$ 894,684	$ 1,162,974	$ 764,480	$ 1,029,187	$ 844,521	$ 131,095	$ 43,060	$ 75,221	$ 323,226
Weighted average asset allocation
Equity securities, Plan Assets	62.00%	58.00%
Equity securities, Target Allocation	58.00%	63.00%
Debt securities, Plan Assets	32.00%	29.00%
Debt securities, Target Allocation	32.00%	35.00%
Real estate, Plan Assets	3.00%	1.00%
Real estate, Target Allocation	9.00%	1.00%
Other(1), Plan Assets	3.00%	12.00%
Other(1), Target Allocation	1.00%	1.00%
Asset Allocation Total, Plan Assets	100.00%	100.00%
Asset Allocation Total, Target Allocation	100.00%	100.00%