| | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Beginning Cash Position | | 408000000.0 | 575000000.0 | 670000000.0 | 740000000.0 | 893000000.0 |
| Capital Expenditure | | -2546000000.0 | -2542000000.0 | -2624000000.0 | -2531000000.0 | -3716000000.0 |
| Capital Expenditure Reported | | -2546000000.0 | -2542000000.0 | -2624000000.0 | -2531000000.0 | -3716000000.0 |
| Cash Dividends Paid | 0.0 | 0.0 | | | | |
| Cash Flow From Continuing Financing Activities | | -2631000000.0 | -3162000000.0 | -2277000000.0 | -2349000000.0 | 47000000.0 |
| Cash Flow From Continuing Investing Activities | | 636000000.0 | -449000000.0 | -909000000.0 | -1554000000.0 | -1832000000.0 |
| Cash Flow From Continuing Operating Activities | | 2173000000.0 | 3706000000.0 | 3409000000.0 | | 1930000000.0 |
| Change In Account Payable | | 360000000.0 | 147000000.0 | 284000000.0 | | 274000000.0 |
| Change In Other Current Assets | | -775000000.0 | -2000000.0 | -287000000.0 | | -144000000.0 |
| Change In Other Current Liabilities | | 865000000.0 | -127000000.0 | 405000000.0 | | 411000000.0 |
| Change In Other Working Capital | | 5000000.0 | 111000000.0 | 432000000.0 | | 285000000.0 |
| Change In Payable | | 360000000.0 | 147000000.0 | 284000000.0 | | 274000000.0 |
| Change In Payables And Accrued Expense | | 360000000.0 | 147000000.0 | 284000000.0 | | 274000000.0 |
| Change In Receivables | | -637000000.0 | -378000000.0 | -1066000000.0 | | -1770000000.0 |
| Change In Working Capital | | -182000000.0 | -249000000.0 | -232000000.0 | | -944000000.0 |
| Changes In Account Receivables | | -637000000.0 | 104000000.0 | 33000000.0 | | -69000000.0 |
| Changes In Cash | | 178000000.0 | 95000000.0 | 223000000.0 | 191000000.0 | 145000000.0 |
| Common Stock Dividend Paid | 0.0 | 0.0 | | | | |
| Common Stock Issuance | 460000000.0 | 0.0 | 0.0 | | | |
| Common Stock Payments | -18000000.0 | -21000000.0 | | | | |
| Deferred Income Tax | | 65000000.0 | 394000000.0 | 426000000.0 | | 197000000.0 |
| Deferred Tax | | 65000000.0 | 394000000.0 | 426000000.0 | | 197000000.0 |
| Depreciation Amortization Depletion | | 2298000000.0 | 2198000000.0 | 2198000000.0 | | 2177000000.0 |
| Depreciation And Amortization | | 2298000000.0 | 2198000000.0 | 2198000000.0 | | 2177000000.0 |
| End Cash Position | | 586000000.0 | 670000000.0 | 893000000.0 | 931000000.0 | 1038000000.0 |
| Financing Cash Flow | | -2631000000.0 | -3162000000.0 | -2277000000.0 | -2349000000.0 | 47000000.0 |
| Free Cash Flow | | -373000000.0 | 1164000000.0 | 785000000.0 | 1563000000.0 | -1786000000.0 |
| Gain Loss On Sale Of PPE | -22000000.0 | 0.0 | | | | |
| Income Tax Paid Supplemental Data | | 2000000.0 | 6000000.0 | 8000000.0 | 12000000.0 | |
| Interest Paid Supplemental Data | | 1852000000.0 | 2180000000.0 | 1933000000.0 | 1786000000.0 | |
| Investing Cash Flow | | 636000000.0 | -449000000.0 | -909000000.0 | -1554000000.0 | -1832000000.0 |
| Issuance Of Capital Stock | 460000000.0 | 0.0 | 0.0 | | | |
| Issuance Of Debt | | 1069000000.0 | 4822000000.0 | 1744000000.0 | 2802000000.0 | 4613000000.0 |
| Long Term Debt Issuance | | 1069000000.0 | 4822000000.0 | 1670000000.0 | 2802000000.0 | 3773000000.0 |
| Long Term Debt Payments | | -3752000000.0 | -7697000000.0 | -3973000000.0 | -4996000000.0 | -4503000000.0 |
| Net Business Purchase And Sale | -28000000.0 | -321000000.0 | 0.0 | 0.0 | | |
| Net Common Stock Issuance | 460000000.0 | -21000000.0 | 0.0 | | | |
| Net Income From Continuing Operations | | 127000000.0 | 1188000000.0 | 1262000000.0 | | 564000000.0 |
| Net Investment Purchase And Sale | | 3715000000.0 | 1588000000.0 | 996000000.0 | 91000000.0 | 1287000000.0 |
| Net Issuance Payments Of Debt | | -2683000000.0 | -2875000000.0 | -2229000000.0 | -2194000000.0 | 110000000.0 |
| Net Long Term Debt Issuance | | -2683000000.0 | -2875000000.0 | -2303000000.0 | -2194000000.0 | -730000000.0 |
| Net Other Financing Charges | | 52000000.0 | -287000000.0 | -48000000.0 | -155000000.0 | -63000000.0 |
| Net Other Investing Changes | | -359000000.0 | 275000000.0 | 65000000.0 | 385000000.0 | 254000000.0 |
| Net PPEPurchase And Sale | | 147000000.0 | 230000000.0 | 654000000.0 | 501000000.0 | 343000000.0 |
| Net Short Term Debt Issuance | | | 0.0 | 74000000.0 | | 840000000.0 |
| Operating Cash Flow | | 2173000000.0 | 3706000000.0 | 3409000000.0 | 4094000000.0 | 1930000000.0 |
| Operating Gains Losses | | -402000000.0 | 253000000.0 | -73000000.0 | | -11000000.0 |
| Other Non Cash Items | | 189000000.0 | -175000000.0 | -261000000.0 | | -108000000.0 |
| Pension And Employee Benefit Expense | | -405000000.0 | -14000000.0 | -82000000.0 | | -31000000.0 |
| Purchase Of Business | -28000000.0 | -321000000.0 | 0.0 | 0.0 | | |
| Purchase Of Investment | | -11257000000.0 | -7324000000.0 | -7194000000.0 | -7160000000.0 | -4905000000.0 |
| Purchase Of PPE | -204000000.0 | -360000000.0 | | | | |
| Repayment Of Debt | | -3752000000.0 | -7697000000.0 | -3973000000.0 | -4996000000.0 | -4503000000.0 |
| Repurchase Of Capital Stock | -18000000.0 | -21000000.0 | | | | |
| Sale Of Business | 5000000.0 | | | | | |
| Sale Of Investment | | 14972000000.0 | 8912000000.0 | 8190000000.0 | 7251000000.0 | 6192000000.0 |
| Sale Of PPE | | 147000000.0 | 230000000.0 | 654000000.0 | 501000000.0 | 343000000.0 |
| Short Term Debt Issuance | | | 0.0 | 74000000.0 | | 840000000.0 |
| Stock Based Compensation | | 78000000.0 | 97000000.0 | 89000000.0 | | 55000000.0 |