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Employee Benefit Plans - Plan's target asset allocations and weighted average asset allocation of plan assets (Details 5)		Jun. 30, 2017	Jun. 30, 2016
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets		33.00%	19.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets		38.00%	43.00%
Global asset allocation/risk parity
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	[1]	17.00%	26.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets		12.00%	12.00%
Minimum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		48.00%
Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		20.00%
Minimum | Global asset allocation/risk parity
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018	[1]	2.00%
Minimum | Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		0.00%
Maximum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		68.00%
Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		40.00%
Maximum | Global asset allocation/risk parity
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018	[1]	22.00%
Maximum | Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation for 2018		10.00%
[1] The global asset allocation/risk parity category consists of a variety of asset classes including, but not limited to, global bonds, global equities, real estate and commodities.

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- Definition

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Percentage of plan assets to benefit obligation of defined benefit plan.

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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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