Productivity Initiatives (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Jul. 27, 2011 Employees
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cash Paid in Fiscal 2012	$ 130
Restructuring and Related Cost, Expected Cost in Fiscal 2012	160
Restructuring and Related Cost, Expected Cost, Per Share Amount in Fiscal 2012	$ 0.35
Restructuring and Related Cost, Incurred Cost	40.5
Restructuring and Related Cost, Incurred Cost, After Tax	28.4
Restructuring and Related Cost, Incurred Cost, Per Share Amount	$ 0.09
Asset Impairment Charges	16.8
Severance Costs	14.9
Restructuring and Related Cost, Number of Positions Eliminated	160
Other Restructuring Costs	8.8
Restructuring and Related Cost, Incurred Cost, Cost of Products Sold	31.4
Restructuring and Related Cost, Incurred Cost, Selling General and Administrative Expense	9.1
Restructuring Reserve, Settled with Cash	10.9
Restructuring Reserve	$ 11.1
Upper Limit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated in Fiscal 2012	1,000
Lower Limit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated in Fiscal 2012	800

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Restructuring and related cost, incurred cost, after tax.

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The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

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Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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The number of positions eliminated during the period as a result of restructuring activities.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

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