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Retirement Benefits (Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
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Plans with accumulated benefit obligation in excess of plan assets |  |
Projected benefit obligation, plans with ABO in excess of plan assets | $ (198,165) | $ (25,955)
Accumulated benefit obligation, plans with ABO in excess of plan assets | (196,694) | (25,955)
Fair value of plan assets, plans with ABO in excess of plan assets | 185,623 | 24,671
Plans with accumulated benefit obligation less than plan assets |  |
Projected benefit obligation, plans with ABO less than plan assets | (9,936) | (175,320)
Accumulated benefit obligation, plans with ABO less than plan assets | (8,918) | (172,509)
Fair value of plan assets, plans with ABO less than plan assets | $ 10,630 | $ 180,490

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- Definition If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=58242635&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 + Details
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