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Variable Interest Entities Variable Interest Entities (Details) - USD ($) $ in Millions | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2018 | Jun. 30, 2018 | Sep. 30, 2013 | Sep. 30, 2012
Variable Interest Entities |  |  |  |  |  |
Accrued interest | $ 25 |  | $ 11 |  |  |
VIE Financing |  |  |  |  |  |
Construction management agreement and lease |  |  | 1,206 | $ 1,220 |  | $ 1,000
Face amount | $ 40 |  |  |  |  |
Financial instruments subject to mandatory redemption, interest rate, stated percentage | 7.00% |  |  |  |  |
Liabilities |  |  |  |  |  |
Current maturities of long-term debt of variable interest entities | $ 38 |  | 38 |  |  |
Long-term debt of variable interest entities, net | 1,127 |  | 1,127 |  |  |
Interest Expense | 14 | $ 15 |  |  |  |
SCCG |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Face amount |  |  |  |  | $ 360 |
Debt and Capital Lease Obligations |  |  |  |  | $ 400 |
JSCCG |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Face amount |  |  |  |  |  | 900
Holdco |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Face amount |  |  |  |  |  | $ 100
Accounts payable and accrued liabilities |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Construction management agreement and lease | 2 |  | 2 |  |  |
Total current liabilities |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Construction management agreement and lease |  |  | 51 | $ 65 |  |
Other long-term liabilities |  |  |  |  |  |
VIE Financing |  |  |  |  |  |
Construction management agreement and lease | $ 28 |  | $ 28 |  |  |

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