| | 2020-09-30 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Amortization Cash Flow | | | 73000000.0 | 128000000.0 | 139000000.0 | | 132000000.0 |
| Amortization Of Intangibles | | | 73000000.0 | 128000000.0 | 139000000.0 | | 132000000.0 |
| Asset Impairment Charge | | | 0.0 | 0.0 | 389000000.0 | 904000000.0 | 2118000000.0 |
| Beginning Cash Position | | | 4594000000.0 | 4091000000.0 | 3721000000.0 | 1836000000.0 | 3158000000.0 |
| Capital Expenditure | | | -205000000.0 | -196000000.0 | -142000000.0 | -148000000.0 | -216000000.0 |
| Capital Expenditure Reported | | | -205000000.0 | -196000000.0 | -142000000.0 | -148000000.0 | -216000000.0 |
| Cash Dividends Paid | | | -6599000000.0 | -6779000000.0 | -6845000000.0 | -6879000000.0 | -6960000000.0 |
| Cash Flow From Continuing Financing Activities | | | -9541000000.0 | -8374000000.0 | -11491000000.0 | -9218000000.0 | -7615000000.0 |
| Cash Flow From Continuing Investing Activities | | | 782000000.0 | -1283000000.0 | 2175000000.0 | -183000000.0 | -341000000.0 |
| Cash Flow From Continuing Operating Activities | | | 8256000000.0 | 9287000000.0 | 8753000000.0 | 8876000000.0 | 9290000000.0 |
| Change In Account Payable | | | 92000000.0 | 38000000.0 | 116000000.0 | 9000000.0 | 34000000.0 |
| Change In Accrued Expense | | | -424000000.0 | -362000000.0 | -209000000.0 | -222000000.0 | -176000000.0 |
| Change In Income Tax Payable | -85000000.0 | | | | | | |
| Change In Inventory | | | 14000000.0 | -15000000.0 | 102000000.0 | 88000000.0 | -27000000.0 |
| Change In Other Working Capital | | | -247000000.0 | 286000000.0 | 248000000.0 | 200000000.0 | 331000000.0 |
| Change In Payable | | | 92000000.0 | 38000000.0 | 116000000.0 | 9000000.0 | 34000000.0 |
| Change In Payables And Accrued Expense | | | -332000000.0 | -324000000.0 | -93000000.0 | -213000000.0 | -142000000.0 |
| Change In Receivables | | | -21000000.0 | 6000000.0 | -106000000.0 | -167000000.0 | -86000000.0 |
| Change In Tax Payable | -85000000.0 | | | | | | |
| Change In Working Capital | | | -586000000.0 | -47000000.0 | 151000000.0 | -92000000.0 | 76000000.0 |
| Changes In Cash | | | -503000000.0 | -370000000.0 | -563000000.0 | -525000000.0 | 1334000000.0 |
| Common Stock Dividend Paid | | | -6599000000.0 | -6779000000.0 | -6845000000.0 | -6879000000.0 | -6960000000.0 |
| Common Stock Payments | | | -1825000000.0 | -1000000000.0 | -3400000000.0 | -1590000000.0 | -1000000000.0 |
| Deferred Income Tax | | | -931000000.0 | 881000000.0 | -177000000.0 | -676000000.0 | -13000000.0 |
| Deferred Tax | | | -931000000.0 | 881000000.0 | -177000000.0 | -676000000.0 | -13000000.0 |
| Depreciation | | | 153000000.0 | 144000000.0 | 147000000.0 | | 134000000.0 |
| Depreciation Amortization Depletion | | | 226000000.0 | 272000000.0 | 286000000.0 | 289000000.0 | 266000000.0 |
| Depreciation And Amortization | | | 226000000.0 | 272000000.0 | 286000000.0 | 289000000.0 | 266000000.0 |
| Dividend Received CFO | | | 104000000.0 | 163000000.0 | 139000000.0 | 181000000.0 | 208000000.0 |
| Earnings Losses From Equity Investments | | | 3656000000.0 | -243000000.0 | -652000000.0 | -529000000.0 | -510000000.0 |
| End Cash Position | | | 4091000000.0 | 3721000000.0 | 3158000000.0 | 1311000000.0 | 4492000000.0 |
| Financing Cash Flow | | | -9541000000.0 | -8374000000.0 | -11491000000.0 | -9218000000.0 | -7615000000.0 |
| Free Cash Flow | | | 8051000000.0 | 9091000000.0 | 8611000000.0 | 8728000000.0 | 9074000000.0 |
| Gain Loss On Investment Securities | | 148000000.0 | 15000000.0 | | -2700000000.0 | -115000000.0 | |
| Income Tax Paid Supplemental Data | | | 2657000000.0 | 1874000000.0 | 1709000000.0 | | 1695000000.0 |
| Interest Paid Supplemental Data | | | 1119000000.0 | 1116000000.0 | 1113000000.0 | | 1114000000.0 |
| Investing Cash Flow | | | 782000000.0 | -1283000000.0 | 2175000000.0 | -183000000.0 | -341000000.0 |
| Issuance Of Debt | | | 0.0 | 2998000000.0 | 0.0 | 997000000.0 | 1992000000.0 |
| Long Term Debt Issuance | | | 0.0 | 998000000.0 | 0.0 | 997000000.0 | 1992000000.0 |
| Long Term Debt Payments | | | -1105000000.0 | -1566000000.0 | -1121000000.0 | -1607000000.0 | -1607000000.0 |
| Net Business Purchase And Sale | | | 1000000000.0 | -1051000000.0 | 2353000000.0 | 0.0 | 0.0 |
| Net Common Stock Issuance | | | -1825000000.0 | -1000000000.0 | -3400000000.0 | -1590000000.0 | -1000000000.0 |
| Net Income From Continuing Operations | | | 5764000000.0 | 8130000000.0 | 11264000000.0 | 8787000000.0 | 6947000000.0 |
| Net Investment Purchase And Sale | | | | | | | 0.0 |
| Net Issuance Payments Of Debt | | | -1105000000.0 | -568000000.0 | -1121000000.0 | -610000000.0 | 385000000.0 |
| Net Long Term Debt Issuance | | | -1105000000.0 | -568000000.0 | -1121000000.0 | -610000000.0 | 385000000.0 |
| Net Other Financing Charges | | | -12000000.0 | -27000000.0 | -125000000.0 | -139000000.0 | -40000000.0 |
| Net Other Investing Changes | | | -13000000.0 | -36000000.0 | -36000000.0 | -35000000.0 | -125000000.0 |
| Net Short Term Debt Issuance | | | 0.0 | 0.0 | 0.0 | | 0.0 |
| Operating Cash Flow | | | 8256000000.0 | 9287000000.0 | 8753000000.0 | 8876000000.0 | 9290000000.0 |
| Operating Gains Losses | | | 3656000000.0 | -243000000.0 | -3352000000.0 | -644000000.0 | -510000000.0 |
| Other Non Cash Items | | | 23000000.0 | 131000000.0 | 53000000.0 | 127000000.0 | 173000000.0 |
| Pension And Employee Benefit Expense | | -175000000.0 | -156000000.0 | | | | |
| Purchase Of Business | | | 0.0 | -2751000000.0 | 0.0 | | 0.0 |
| Repayment Of Debt | | | -1105000000.0 | -3566000000.0 | -1121000000.0 | -1607000000.0 | -1607000000.0 |
| Repurchase Of Capital Stock | | | -1825000000.0 | -1000000000.0 | -3400000000.0 | -1590000000.0 | -1000000000.0 |
| Sale Of Business | | | 1000000000.0 | 1700000000.0 | 2353000000.0 | 0.0 | 0.0 |
| Sale Of Investment | | | | | | | 0.0 |
| Short Term Debt Issuance | | | 0.0 | 2000000000.0 | 0.0 | | 0.0 |
| Short Term Debt Payments | | | 0.0 | -2000000000.0 | 0.0 | | 0.0 |
| Unrealized Gain Loss On Investment Securities | | | | 0.0 | 0.0 | | 25000000.0 |