Employees' Stock Incentive Plans and Management Incentive Plans 6 (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Apr. 27, 2011	Apr. 28, 2010	Apr. 29, 2009
Restricted Stock Award
Number of shares forfeited and returned to the plan	49,000	20,000	32,000
Employees Stock Incentive Plans And Management Incentive Plans (Textuals) [Abstract]
Compensation expenses relating to RSUs and restricted stock	$ 23.2	$ 24.8	$ 26.6
Activity of unvested RSU and restricted stock awards
Unvested units and stock, Number of Units, Begining Balance	1,496,000	1,722,000	2,087,000
Units and stock granted, Number of Units	574,000	628,000	577,000
Units and stock vested, Number of Units	(725,000)	(834,000)	(910,000)
Units and stock cancelled/forfeited and returned to the plan, Number of Units	(49,000)	(20,000)	(32,000)
Unvested units and stock, Number of Units, Ending Balance	1,296,000	1,496,000	1,722,000
Unvested units and stock, Weighted Grant Date Fair Value, Begining Balance	$ 44.13	$ 44.08	$ 39.88
Units and stock granted, Weighted Grant Date Fair Value	$ 46.74	$ 39.55	$ 49.69
Units and stock vested, Weighted Grant Date Fair Value	$ 44.96	$ 40.59	$ 37.91
Units and stock cancelled/forfeited and returned to the plan, Weighted Grant Date Fair Value	$ 43.47	$ 44.12	$ 46.52
Unvested units and stock, Weighted Grant Date Fair Value, Ending Balance	$ 44.84	$ 44.13	$ 44.08
Restricted Stock [Member]
Restricted Stock Award
Number of shares authorized	9,440,000
Number of shares reserved for issuance	(5,851,000)
Number of shares forfeited and returned to the plan	1,319,000
Shares available for grant as stock options	4,908,000
Employees Stock Incentive Plans And Management Incentive Plans (Textuals) [Abstract]
Unrecognized compensation costs	$ 29.4	$ 29.8	$ 31.8
Weighted average period of recognition for unrecognized compensation costs	1.7
Activity of unvested RSU and restricted stock awards
Units and stock cancelled/forfeited and returned to the plan, Number of Units	(1,319,000)

Activity of unvested RSU and restricted stock awards.

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Employees' Stock Incentive Plans and Management Incentive Plans.

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Share Based Compensation Restricted Stock Award.

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Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
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As of the balance-sheet date, the aggregate unrecognized cost of share-based awards made to employees under share-based compensation plans that have yet to vest.

+ References

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The weighted average period over which unrecognized share-based compensation costs are expected to be reported.

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The noncash expense that represents the cost of restricted stock distributed to employees as compensation.

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The number of shares under a share-based award plan other than a stock option plan that were settled during the reporting period due to a failure to satisfy vesting conditions pertaining to all option plans.

+ References

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The weighted average fair value as of the grant date of share-based award plans other than stock option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

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The number of shares issuable under a share-based award plan pertaining to grants made during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

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The weighted average fair value at grant for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

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The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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The weighted average fair value of nonvested awards on share-based plans excluding option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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The weighted average fair value as of grant dates pertaining to a share-based award plan other than a stock option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

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The maximum number of shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the share-based compensation plan. As stock options and equity instruments other than options are awarded to participants, the shares remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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The difference between the maximum number of shares authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares already issued upon exercise of options or other share-based awards under the plan, and 2) shares reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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