Pension and Postretirement Benefit Plans (Plan Assets, Schedule of Allocations by Asset Category) (Details) - Pension [Member]	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Target plan assets allocation	100.00%	100.00%
Actual plan assets allocation	100.00%	100.00%
Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan assets allocation	35.00%	35.00%
Actual plan assets allocation	34.00%	30.00%
Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan assets allocation	30.00%	30.00%
Actual plan assets allocation	29.00%	32.00%
International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan assets allocation	25.00%	25.00%
Actual plan assets allocation	27.00%	27.00%
Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan assets allocation	10.00%	10.00%
Actual plan assets allocation	10.00%	11.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(i)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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