Impairments and Disposal of Assets, Net (Details) $ in Millions	12 Months Ended
May 31, 2020 USD ($) restaurant	May 26, 2019 USD ($)	May 27, 2018 USD ($)
Asset Impairment Charges [Abstract]
Restaurant impairments	$ 51.2	$ 19.5	$ 3.7
Disposal (gains) losses	(2.4)	(0.7)	(1.1)
Other	172.2	0.2	0.8
Impairments and disposal of assets, net	$ 221.0	$ 19.0	$ 3.4
Number of underperforming restaurants closed \| restaurant	11
Number of restaurants projected cash flows insufficient to cover carrying value \| restaurant	9

Number of Restaurants Project Cash Flows Insufficient to Cover Carrying Value

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Number of Underperforming Restaurants Closed

+ References

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
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-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

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Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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