Note N - Pension and Other Postretirement Benefit Plans - Pension Plan Weighted-Average Asset Allocations (Details)	Jun. 30, 2025	Jun. 30, 2024
Target Allocation	100.00%
Actual Allocation	100.00%	100.00%
Equity Securities [Member]
Target Allocation	15.00%
Actual Allocation	15.00%	19.00%
Debt Securities [Member]
Target Allocation	75.00%
Actual Allocation	78.00%	71.00%
Real Estate [Member]
Target Allocation	10.00%
Actual Allocation	7.00%	10.00%

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant