Financial Instruments, Risk Management Activities, and Fair Values (Schedule of interest rate derivatives) (Details) - USD ($) $ in Millions	May 31, 2020	May 26, 2019
Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 666.1	$ 500.0
Average Receive Rate	0.40%	2.20%
Average Pay Rate	0.30%	3.10%
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 500.0	$ 0.0
Average Receive Rate	1.70%	0.00%
Average Pay Rate	2.10%	0.00%

Average fixed interest rate related to the group of interest rate derivatives.

No definition available.

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- Definition

Average variable interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

+ Details

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- Details

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- Details

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