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Debt and Other Obligations Debt and Other Obligations - Secured Debt of VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014	Aug. 09, 2013	Jan. 17, 2012
Debt Instrument
Membership interests of VIE subject to mandatory redemption	$ 47	$ 50	$ 40
Long-term debt of variable interest entities (including current maturities)	$ 1,407	$ 1,425
SCCG
Debt Instrument
Face Amount			$ 360
Interest rate			3.846%
JSCCG
Debt Instrument
Face Amount				$ 900
Interest rate				4.626%
Holdco
Debt Instrument
Face Amount				$ 100
Interest rate				7.10%
Holdco balloon payment upon maturity				$ 10

X

- Definition

The balloon payment amount due at maturity on the Holdco secured notes.

+ References

No definition available.

+ Details

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X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



-Section 55



-Paragraph 8



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-SubTopic 30



-Section 45



-Paragraph 2



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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.22(a)(1))



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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.

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- Definition

Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.22)



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-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 19, 20, 22



-Article 5

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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



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- Details

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