| Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
|---|
| Net loss | -16 | 56 | 237 | 216 | 95 |
|---|
| Provision for deferred income taxes | - | 17 | 75 | 66 | 35 |
|---|
| Loss on extinguishment of debt | - | - | - | -27 | - |
|---|
| (Gain) loss on derivative instruments, net | - | - | - | 28 | -46 |
|---|
| Cash paid on settlement of derivative instruments | - | - | - | 24 | 14 |
|---|
| Amortization of debt issuance costs | 0 | 0 | 6 | 11 | 8 |
|---|
| Amortization of discounts on long-term debt | - | - | 8 | 15 | 10 |
|---|
| Stock-based compensation expense | 16 | 7 | 33 | 26 | 13 |
|---|
| Accretion expense | 0 | 0 | 0 | 1 | 1 |
|---|
| Depletion, depreciation and amortization | 10 | 65 | 178 | 424 | 501 |
|---|
| Exploration and abandonment expense | 5 | 1 | 0 | 4 | 1 |
|---|
| Accounts receivable | 5 | 32 | 57 | -2 | -9 |
|---|
| Prepaid expenses, inventory and other assets | 1 | 7 | 12 | -7 | 19 |
|---|
| us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | -2 | 25 | 34 | 8 | 5 |
|---|
| Net cash provided by operating activities | 5 | 147 | 504 | 756 | 690 |
|---|
| Additions to crude oil and natural gas properties | 65 | 236 | 1,047 | 1,010 | 605 |
|---|
| Changes in working capital associated with oil and gas property additions | -6 | 37 | 129 | -101 | -1 |
|---|
| Acquisitions of crude oil and natural gas properties | 1 | 54 | 262 | 15 | 15 |
|---|
| Proceeds from sales of properties | - | 3 | - | - | 0 |
|---|
| Other property additions | 0 | 1 | 2 | 0 | 0 |
|---|
| Net cash used in investing activities | -72 | -250 | -1,182 | -1,126 | -621 |
|---|
| Repayments under Term Loan Credit Agreement | - | - | - | - | 120 |
|---|
| Repurchased shares under buyback program | - | - | - | - | 35 |
|---|
| Dividends paid | - | 12 | 10 | 12 | 20 |
|---|
| Dividend equivalents paid | - | 1 | 1 | 1 | 2 |
|---|
| Debt issuance costs | 0 | 2 | 17 | 28 | 0 |
|---|
| Proceeds from exercises of warrants | - | 5 | 8 | 4 | 0 |
|---|
| Borrowings under Term Loan Credit Agreement, net of discount | - | - | - | 1,170 | - |
|---|
| Borrowings under Prior Credit Agreement | - | - | - | 255 | - |
|---|
| Proceeds from issuance of senior notes, net of discount | - | - | 440 | - | - |
|---|
| Repayments under Prior Credit Agreement | - | 20 | 755 | 525 | - |
|---|
| Repayments of 10.000% Senior Notes and 10.625% Senior Notes | - | - | - | 475 | - |
|---|
| Premium on extinguishment of debt | - | - | - | 4 | - |
|---|
| Proceeds from issuance of common stock | - | - | 85 | 156 | - |
|---|
| Stock offering costs | 8 | 2 | 0 | 5 | - |
|---|
| Proceeds from exercises of stock options | - | 2 | 0 | 0 | - |
|---|
| Net cash provided by financing activities | 84 | 119 | 674 | 534 | -177 |
|---|
| Net (decrease) increase in cash and cash equivalents | 18 | 15 | -4 | 164 | -108 |
|---|
| Cash paid for interest | - | 2 | 24 | 133 | 152 |
|---|
| Cash paid for income taxes | - | - | - | - | - |
|---|
| us-gaap_StockIssued1 | - | - | 265 | - | - |
|---|
| Additions to asset retirement obligations | -0 | 2 | 3 | 6 | 1 |
|---|