Retirement Plans (Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	May 26, 2013	May 27, 2012
Compensation and Retirement Disclosure [Abstract]
Accumulated benefit obligation for all pension plans	$ 267.6	$ 265.0
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	267.6	265.0
Fair value of plan assets	234.1	203.5
Projected benefit obligations for all plans with projected benefit obligations in excess of plan assets	$ 276.8	$ 274.4

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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