Commitments And Contingencies (Details) - USD ($) $ in Millions	May 31, 2020	May 26, 2019
Workers Compensation And General Liabilities Accrued
Commitments and Contingencies [Line Items]
Standby letters of credit	$ 65.2	$ 75.9
Surety Bond And Other Payments
Commitments and Contingencies [Line Items]
Standby letters of credit	44.0	21.6
Property Lease Guarantee
Commitments and Contingencies [Line Items]
Fair value of potential payments discounted at pre-tax cost of capital related to guarantee obligations	122.4	123.2
Maximum \| Property Lease Guarantee
Commitments and Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 151.5	$ 151.6

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12021-110248

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant