Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011	May 27, 2012
Income Taxes [Line Items]
Income tax expense	$ 109.1	$ 92.9	$ 232.6	$ 141.6
Effective tax rate	34.00%	33.00%	34.00%	34.00%
Gross unrecognized tax benefits	46.2		46.2		48.7
Unrecognized tax benefits with uncertainty of timing of deductibility	2.4		2.4		3.1
Unrecognized liabilities for gross interest and penalties	12.5		12.5		14.0
Unrecognized tax benefits that would favorably impact effective tax rate	29.1		29.1		30.3
Gross unrecognized tax benefits, actual	$ 6		$ 6

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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