Debt (Schedule of credit facilities) (Details) $ in Billions	12 Months Ended
	May 30, 2021 USD ($)
Line of Credit Facility [Line Items]
Facility Amount	$ 3.5
Borrowed Amount	0.4
Committed Credit Facilities [Member]
Line of Credit Facility [Line Items]
Facility Amount	2.9
Borrowed Amount	$ 0.0
Compliance with credit facility covenants	We were in compliance with all credit facility covenants as of May 30, 2021.
Line Of Credit Expiring April 2026 [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 2.7
Borrowed Amount	$ 0.0
Expiration date of credit facility	Apr. 30, 2026
Line Of Credit Expiring September 2022 [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 0.2
Borrowed Amount	$ 0.0
Expiration date of credit facility	Sep. 17, 2022
Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 0.6
Borrowed Amount	$ 0.4