Stock-Based Compensation (Stock Option Activity) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 27, 2012	May 29, 2011	May 30, 2010
Total intrinsic value of options exercised	$ 49.7	$ 49.9	$ 59.1
Cash received from option exercises	62.9	55.7	59.3
Vesting period (years)	four
Stock options
Unrecognized compensation cost related to unvested stock options granted	33.4
Unrecognized compensation cost, period of recognition, in years (years)	2.5
Fair market value on grant date	$ 21.1

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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