Stock-Based Compensation (Darden Stock Unit Activity) (Narrative) (Details) - Darden stock units - USD ($) $ in Millions	12 Months Ended
May 27, 2018	May 28, 2017
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Total stock unit liability	$ 62.7	$ 65.0
Unrecognized compensation cost related to unvested stock options granted	$ 44.8
Unrecognized compensation cost, period of recognition, in years (years)	2 years 7 months
Fair market value on grant date	$ 25.8
Other Current Liabilities
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Current stock unit liability	26.1	24.0
Other Liabilities
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Noncurrent stock unit liability	$ 36.6	$ 41.0

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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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.

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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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