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Variable Interest Entities Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013	Aug. 09, 2013	Jan. 17, 2012
VIE Financing
Membership interests of VIE subject to mandatory redemption	$ 50	$ 50	$ 40
Total liabilities of VIE	1,392	1,393		1,000
SCCG
VIE Financing
Face amount			360
JSCCG
VIE Financing
Face amount				900
Holdco
VIE Financing
Face amount				100
Accrued interest of VIE
VIE Financing
Total liabilities of VIE	27	12
Current portion of membership interests of VIE subject to mandatory redemption
VIE Financing
Total liabilities of VIE	2	2
Current maturities of long-term debt of VIE
VIE Financing
Total liabilities of VIE	31	30
Total current liabilities of VIE
VIE Financing
Total liabilities of VIE	60	44
Membership interests of VIE subject to mandatory redemption
VIE Financing
Total liabilities of VIE	37	38
Long-term debt of VIE
VIE Financing
Total liabilities of VIE	$ 1,295	$ 1,311

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- 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 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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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

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- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5710-111685

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