Stock-Based Compensation (Darden Stock Unit Activity) (Narrative) (Details) - Darden stock units - USD ($) $ in Millions	12 Months Ended
May. 31, 2015	May. 25, 2014
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Total stock unit liability	$ 46.1	$ 57.3
Unrecognized compensation cost related to unvested stock options granted	$ 34.0
Unrecognized compensation cost, period of recognition, in years (years)	3 years
Fair market value on grant date	$ 21.5
Other Current Liabilities
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Current stock unit liability	16.2	32.8
Other Liabilities
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Noncurrent stock unit liability	$ 29.9	$ 24.5

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable after one year (or the operating cycle, if longer).

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Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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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