Fresh Start Accounting - Accumulated Deficit (Details) - USD ($)
$ in Millions |
1 Months Ended |
2 Months Ended |
10 Months Ended |
Dec. 31, 2017 |
Dec. 15, 2017 |
Sep. 30, 2018 |
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Net gain on settlement of Liabilities subject to compromise |
$ 0
|
|
$ 0
|
| Discharge of Debt |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Net gain on settlement of Liabilities subject to compromise |
|
$ 1,778
|
|
| Expense for certain professional fees |
|
(26)
|
|
| Benefit from income taxes |
|
118
|
|
| Cancellation of Predecessor equity awards |
|
6
|
|
| Cancellation of Predecessor Common stock |
|
2,387
|
|
| Total |
|
4,846
|
|
| Series B Preferred Stock | Discharge of Debt |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
397
|
|
| Series A Preferred Stock | Discharge of Debt |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
186
|
|
| As Previously Reported |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Net gain on settlement of Liabilities subject to compromise |
|
1,804
|
|
| Expense for certain professional fees |
|
(26)
|
|
| Benefit from income taxes |
|
118
|
|
| Cancellation of Predecessor equity awards |
|
6
|
|
| Cancellation of Predecessor Common stock |
|
2,387
|
|
| Total |
|
4,872
|
|
| As Previously Reported | Discharge of Debt |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Total |
|
4,872
|
|
| As Previously Reported | Series B Preferred Stock |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
397
|
|
| As Previously Reported | Series A Preferred Stock |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
186
|
|
| Adjustments |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Net gain on settlement of Liabilities subject to compromise |
|
(26)
|
|
| Expense for certain professional fees |
|
0
|
|
| Benefit from income taxes |
|
0
|
|
| Cancellation of Predecessor equity awards |
|
0
|
|
| Cancellation of Predecessor Common stock |
|
0
|
|
| Total |
|
(26)
|
|
| Adjustments | Discharge of Debt |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Total |
|
(26)
|
|
| Adjustments | Series B Preferred Stock |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
0
|
|
| Adjustments | Series A Preferred Stock |
|
|
|
| Fresh-Start Adjustment [Line Items] |
|
|
|
| Cancellation of Predecessor Preferred stock |
|
$ 0
|
|