Retirement Plans (Details Textuals) (Details) $ in Millions	Jun. 30, 2018 USD ($)
Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
OneTimePensionPlanContribution	$ 31

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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Balance Type:	na
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