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Pension Benefits (Target And Actual Asset Allocations) (Details) - Pension Benefits [Member] | 12 Months Ended |
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Jun. 30, 2016 | Jun. 30, 2015
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] |  |
Target Percentage of Plan Assets, minimum | 0.00% |
Target Percentage of Plan Assets, maximum | 10.00% |
Actual Percentage of Plan Assets | 2.00% | 2.00%
Equity Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets, minimum | 30.00% |
Target Percentage of Plan Assets, maximum | 70.00% |
Actual Percentage of Plan Assets | 50.00% | 49.00%
Fixed Income [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Percentage of Plan Assets, minimum | 30.00% |
Target Percentage of Plan Assets, maximum | 70.00% |
Actual Percentage of Plan Assets | 48.00% | 49.00%

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