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Retirement Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
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Mar. 31, 2015 | Sep. 30, 2014
Decrease in accumulated other comprehensive loss net of tax | $ (6.4)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |
Defined Benefit Plan, Funded Percentage |  | 89.00%us-gaap_DefinedBenefitPlanFundedPercentage
UNITED STATES |  |
Defined Benefit Plan, Contributions by Employer | $ 1 us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_StatementGeographicalAxis = country_CA |

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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=35743120&loc=d3e1928-114920 + Details
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- Definition Plan assets of a defined benefit plan, as a percentage of projected benefit obligation. + References No definition available. + Details
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Balance Type: | na
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- Definition Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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- Details
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Namespace Prefix: |
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