Leases (Details) (USD $) In Millions	12 Months Ended
Apr. 29, 2011	Apr. 30, 2010	Apr. 24, 2009
Capital Leases, Future Minimum Payments Due [Abstract]
2012	$ 4
2013	4
2014	3
2015	3
2016	3
2017 and thereafter	31
Total minimum lease payments	48
Less amounts representing interest	(14)
Present value of net minimum lease payments	34
Operating Leases, Future Minimum Payments Due [Abstract]
2012	118
2013	86
2014	63
2015	34
2016	22
2017 and thereafter	35
Total minimum lease payments	358
Lease And Rental Expense	148	154	150
Sale Leaseback Transaction Date	April 2006
Sale Leaseback Transaction Lease Terms	seven-year
Sale Leaseback Transaction, Early Buyout Option Year	2010
Sale Leaseback Transaction, Repurchase Year	2009
Sale Leaseback Transaction, Term Loan Balance	$ 31

The year in which the Company can exercise the early buyout option of the sale leaseback equipment at a predetermined fair market value.

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The year in which the Company exercised the early buyout option of the sale leaseback equipment at a predetermined fair market value.

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The sale lease back of the equipment, after the buyout, was converted to a term loan. This amount represents the remaining balance of the term loan.

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The total of contractually required rental payments on leases meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph a(ii)

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Contractually required rental payments on leases meeting the criteria for capitalization, due within one year of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph a(ii)

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Contractually required rental payments on leases meeting the criteria for capitalization, due within the fifth year from the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Contractually required rental payments on leases meeting the criteria for capitalization, due within the fourth year from the balance sheet date.

+ References

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-Name Statement of Financial Accounting Standard (FAS)
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Contractually required rental payments on leases meeting the criteria for capitalization, due within the third year from the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
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Contractually required rental payments on leases meeting the criteria for capitalization, due within the second year from the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Contractually required rental payments due on leases meeting the criteria for capitalization, after the fifth year from the balance sheet date.

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- Definition

Amount necessary to reduce net minimum lease payments to present value calculated at the entity's incremental borrowing rate at the inception of the lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph a(ii)

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- Definition

The discounted value of future cash flows under leases meeting the criteria for capitalization.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
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Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

+ References

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

The total of future contractually required payments on leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

+ References

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

+ References

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

+ References

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- Definition

The date of the transaction involving the sale of the property to another party and the lease of the property back to the seller.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 98
-Paragraph 17

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A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

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