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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
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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 + Details
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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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- 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 + Details
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