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Defined Benefit Pension and Other Postretirement Plans - Narrative (Details) - USD ($) | 6 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans |  |
Contribution made to Pension and Post-retirement Plans | $ 5,700,000 | $ 4,900,000
Expected contribution to pension plan during remainder of fiscal year | 5,500,000 |
Other Postretirement Benefits |  |
Defined Benefit Plans and Other Postretirement Benefit Plans |  |
Contribution made to Pension and Post-retirement Plans | $ 0 | $ 0

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- Definition The increase in the fair value of plan assets from contributions made by the employer. + 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 (b)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
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- Details
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