Unaudited Consolidated Statement of Stockholders' Equity (Parenthetical) - Common Stock - $ / shares	3 Months Ended	9 Months Ended
Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Common
Dividends per common share	$ 0.060	$ 0.060	$ 0.180	$ 0.180
Common Class B
Dividends per common share	$ 0.054	$ 0.054	$ 0.162	$ 0.162

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration