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Pension Benefits (Target And Actual Asset Allocations) (Details) - Defined Benefit Pension Plans [Member] | Jun. 30, 2019 | Jun. 30, 2018
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Defined Benefit Plan Disclosure [Line Items] |  |
Actual Percentage of Plan Assets | 100.00% | 100.00%
Cash And Equivalents [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Percentage of Plan Assets | 2.00% | 5.00%
Cash And Equivalents [Member] | Minimum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 0.00% |
Cash And Equivalents [Member] | Maximum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 10.00% |
Equity Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Percentage of Plan Assets | 53.00% | 51.00%
Equity Securities [Member] | Minimum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 30.00% |
Equity Securities [Member] | Maximum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 70.00% |
Fixed Income [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual Percentage of Plan Assets | 45.00% | 44.00%
Fixed Income [Member] | Minimum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 30.00% |
Fixed Income [Member] | Maximum [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets | 70.00% |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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