| | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-09-30 |
| Beginning Cash Position | | 129000000.0 | 166000000.0 | 111000000.0 | 129000000.0 | 1598000000.0 | 1545000000.0 |
| Capital Expenditure | | -4244000000.0 | -4638000000.0 | -5854000000.0 | -7364000000.0 | -8411000000.0 | -9687000000.0 |
| Capital Expenditure Reported | | -4244000000.0 | -4638000000.0 | -5854000000.0 | -7364000000.0 | -8411000000.0 | -9687000000.0 |
| Cash Dividends Paid | | -935000000.0 | -1012000000.0 | -1092000000.0 | -1175000000.0 | -1225000000.0 | -1258000000.0 |
| Cash Flow From Continuing Financing Activities | | 2135000000.0 | 666000000.0 | 617000000.0 | 2837000000.0 | 3801000000.0 | 4692000000.0 |
| Cash Flow From Continuing Investing Activities | | -4287000000.0 | -4653000000.0 | -5926000000.0 | -7428000000.0 | -8455000000.0 | -9723000000.0 |
| Cash Flow From Continuing Operating Activities | | 2189000000.0 | 3932000000.0 | 5327000000.0 | 4641000000.0 | 4510000000.0 | 4538000000.0 |
| Change In Account Payable | | 138000000.0 | 195000000.0 | -149000000.0 | 37000000.0 | -121000000.0 | -6000000.0 |
| Change In Inventory | | -126000000.0 | -203000000.0 | -98000000.0 | -140000000.0 | -235000000.0 | -271000000.0 |
| Change In Other Current Assets | | -34000000.0 | -58000000.0 | 86000000.0 | -139000000.0 | 3000000.0 | -10000000.0 |
| Change In Other Current Liabilities | | -1000000.0 | 102000000.0 | 200000000.0 | -317000000.0 | -168000000.0 | 123000000.0 |
| Change In Other Working Capital | | -1108000000.0 | 521000000.0 | 928000000.0 | 347000000.0 | 130000000.0 | -56000000.0 |
| Change In Payable | | 138000000.0 | 195000000.0 | -149000000.0 | 37000000.0 | -121000000.0 | -6000000.0 |
| Change In Payables And Accrued Expense | | 138000000.0 | 195000000.0 | -149000000.0 | 37000000.0 | -121000000.0 | -6000000.0 |
| Change In Receivables | | -313000000.0 | -672000000.0 | 225000000.0 | 40000000.0 | -19000000.0 | -69000000.0 |
| Change In Working Capital | | -1444000000.0 | -115000000.0 | 1192000000.0 | -172000000.0 | -410000000.0 | -289000000.0 |
| Changes In Account Receivables | | -164000000.0 | -429000000.0 | -27000000.0 | 19000000.0 | -44000000.0 | -94000000.0 |
| Changes In Cash | | 37000000.0 | -55000000.0 | 18000000.0 | 50000000.0 | -144000000.0 | -493000000.0 |
| Common Stock Dividend Paid | | -935000000.0 | -1012000000.0 | -1092000000.0 | -1175000000.0 | -1225000000.0 | -1258000000.0 |
| Common Stock Issuance | | 366000000.0 | 322000000.0 | 270000000.0 | 1117000000.0 | 2159000000.0 | 1159000000.0 |
| Deferred Income Tax | | -79000000.0 | -140000000.0 | -59000000.0 | 225000000.0 | 222000000.0 | 214000000.0 |
| Deferred Tax | | -79000000.0 | -140000000.0 | -59000000.0 | 225000000.0 | 222000000.0 | 214000000.0 |
| Depreciation | | 2257000000.0 | 2554000000.0 | 2567000000.0 | 2875000000.0 | 2968000000.0 | 3038000000.0 |
| Depreciation Amortization Depletion | | 2257000000.0 | 2554000000.0 | 2567000000.0 | 2875000000.0 | 2968000000.0 | 3038000000.0 |
| Depreciation And Amortization | | 2257000000.0 | 2554000000.0 | 2567000000.0 | 2875000000.0 | 2968000000.0 | 3038000000.0 |
| Dividend Received CFO | | 42000000.0 | 37000000.0 | 35000000.0 | 34000000.0 | 32000000.0 | 24000000.0 |
| Earnings Losses From Equity Investments | | -62000000.0 | -36000000.0 | -35000000.0 | -19000000.0 | 6000000.0 | 3000000.0 |
| End Cash Position | | 166000000.0 | 111000000.0 | 129000000.0 | 179000000.0 | 1454000000.0 | 1052000000.0 |
| Financing Cash Flow | | 2135000000.0 | 666000000.0 | 617000000.0 | 2837000000.0 | 3801000000.0 | 4692000000.0 |
| Free Cash Flow | | -2055000000.0 | -706000000.0 | -527000000.0 | -2723000000.0 | -3901000000.0 | -5149000000.0 |
| Gain Loss On Investment Securities | -27000000.0 | -57000000.0 | | | | | |
| Income Tax Paid Supplemental Data | -12000000.0 | 4000000.0 | 15000000.0 | | | | |
| Interest Paid Supplemental Data | | 788000000.0 | 887000000.0 | 945000000.0 | 1131000000.0 | 1197000000.0 | 1170000000.0 |
| Investing Cash Flow | | -4287000000.0 | -4653000000.0 | -5926000000.0 | -7428000000.0 | -8455000000.0 | -9723000000.0 |
| Issuance Of Capital Stock | | 366000000.0 | 322000000.0 | 270000000.0 | 1117000000.0 | 2159000000.0 | 1159000000.0 |
| Issuance Of Debt | | 2710000000.0 | 2164000000.0 | 2630000000.0 | 3647000000.0 | 3896000000.0 | 5522000000.0 |
| Long Term Debt Issuance | | 2710000000.0 | 2164000000.0 | 2630000000.0 | 3647000000.0 | 3896000000.0 | 4887000000.0 |
| Long Term Debt Payments | | -417000000.0 | -601000000.0 | -1151000000.0 | -656000000.0 | -1038000000.0 | -1329000000.0 |
| Net Business Purchase And Sale | 684000000.0 | 0.0 | 0.0 | | | | |
| Net Common Stock Issuance | | 366000000.0 | 322000000.0 | 270000000.0 | 1117000000.0 | 2159000000.0 | 1159000000.0 |
| Net Income From Continuing Operations | | 1597000000.0 | 1736000000.0 | 1771000000.0 | 1936000000.0 | 2073000000.0 | 1915000000.0 |
| Net Investment Purchase And Sale | | -14000000.0 | -35000000.0 | -35000000.0 | -37000000.0 | -19000000.0 | -13000000.0 |
| Net Issuance Payments Of Debt | | 2714000000.0 | 1371000000.0 | 1451000000.0 | 2901000000.0 | 2876000000.0 | 4793000000.0 |
| Net Long Term Debt Issuance | | 2293000000.0 | 1563000000.0 | 1479000000.0 | 2991000000.0 | 2858000000.0 | 3558000000.0 |
| Net Other Financing Charges | | -10000000.0 | -15000000.0 | -12000000.0 | -6000000.0 | -9000000.0 | -2000000.0 |
| Net Other Investing Changes | | -29000000.0 | 20000000.0 | -37000000.0 | -27000000.0 | -25000000.0 | -23000000.0 |
| Net Short Term Debt Issuance | | 421000000.0 | -192000000.0 | -28000000.0 | -90000000.0 | 18000000.0 | 1235000000.0 |
| Operating Cash Flow | | 2189000000.0 | 3932000000.0 | 5327000000.0 | 4641000000.0 | 4510000000.0 | 4538000000.0 |
| Operating Gains Losses | | -62000000.0 | -36000000.0 | -35000000.0 | -19000000.0 | 6000000.0 | 3000000.0 |
| Other Non Cash Items | | -213000000.0 | -197000000.0 | -248000000.0 | -318000000.0 | -468000000.0 | -458000000.0 |
| Provisionand Write Offof Assets | | 60000000.0 | 73000000.0 | 79000000.0 | 47000000.0 | 50000000.0 | 47000000.0 |
| Purchase Of Investment | | -757000000.0 | -1332000000.0 | -994000000.0 | -998000000.0 | -1100000000.0 | -1159000000.0 |
| Repayment Of Debt | | -417000000.0 | -793000000.0 | -1179000000.0 | -746000000.0 | -1128000000.0 | -729000000.0 |
| Sale Of Business | 684000000.0 | 0.0 | 0.0 | | | | |
| Sale Of Investment | | 743000000.0 | 1297000000.0 | 959000000.0 | 961000000.0 | 1081000000.0 | 1146000000.0 |
| Short Term Debt Payments | | | -192000000.0 | -28000000.0 | -90000000.0 | | |
| Stock Based Compensation | | 31000000.0 | 20000000.0 | 25000000.0 | 33000000.0 | 37000000.0 | 44000000.0 |