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Commitments and Contingencies Commitments and Contingencies - Debt (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Sep. 30, 2014 | Aug. 09, 2013
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Debt Instrument |  |  |
Membership interests of VIE subject to mandatory redemption | $ 47 | $ 50 | $ 40

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- Definition Amount that would be paid, determined under the conditions specified in the contract, if the holder of the share has the right to redeem the shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6940734&loc=d3e22047-110879 + Details
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