| | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-06-30 | 2025-12-31 |
| Beginning Cash Position | | 28418000.0 | 30194000.0 | 34866000.0 | 34386000.0 | 35427000.0 |
| Capital Expenditure | | -236013000.0 | -312347000.0 | -271687000.0 | -282773000.0 | -288941000.0 |
| Capital Expenditure Reported | | -236013000.0 | -312347000.0 | -271687000.0 | -282773000.0 | -288941000.0 |
| Cash Dividends Paid | | -488005000.0 | -544622000.0 | -563333000.0 | -568249000.0 | -572694000.0 |
| Cash Flow From Continuing Financing Activities | | 111233000.0 | -538854000.0 | -599936000.0 | -638655000.0 | -750392000.0 |
| Cash Flow From Continuing Investing Activities | | -929528000.0 | -289138000.0 | -276351000.0 | -237954000.0 | -150990000.0 |
| Cash Flow From Continuing Operating Activities | | 820071000.0 | 832664000.0 | 876848000.0 | 877332000.0 | 902887000.0 |
| Change In Other Current Assets | | 9792000.0 | -33579000.0 | -31144000.0 | -27444000.0 | -8372000.0 |
| Change In Other Current Liabilities | | -13140000.0 | -2828000.0 | -4759000.0 | -32852000.0 | -13888000.0 |
| Change In Working Capital | | -3348000.0 | -36407000.0 | -35903000.0 | -60296000.0 | -22260000.0 |
| Changes In Cash | | 1776000.0 | 4672000.0 | 561000.0 | 723000.0 | 1505000.0 |
| Common Stock Dividend Paid | | -483624000.0 | -539852000.0 | -558482000.0 | -563447000.0 | -567864000.0 |
| Common Stock Issuance | 899053000.0 | 629552000.0 | 0.0 | 0.0 | | |
| Common Stock Payments | | -49028000.0 | -25009000.0 | 0.0 | | -117811000.0 |
| Depreciation Amortization Depletion | | 679572000.0 | 691838000.0 | 695473000.0 | 685171000.0 | 680035000.0 |
| Depreciation And Amortization | | 679572000.0 | 691838000.0 | 695473000.0 | 685171000.0 | 680035000.0 |
| Dividends Received CFI | | 81443000.0 | 14399000.0 | 41097000.0 | 78481000.0 | 150303000.0 |
| Earnings Losses From Equity Investments | | 17422000.0 | 11251000.0 | 41080000.0 | 60689000.0 | 25530000.0 |
| End Cash Position | | 30194000.0 | 34866000.0 | 35427000.0 | 35109000.0 | 36932000.0 |
| Financing Cash Flow | | 111233000.0 | -538854000.0 | -599936000.0 | -638655000.0 | -750392000.0 |
| Free Cash Flow | | 584058000.0 | 520317000.0 | 605161000.0 | 594559000.0 | 613946000.0 |
| Gain Loss On Investment Securities | | -25494000.0 | -351193000.0 | -16867000.0 | -47939000.0 | -242913000.0 |
| Income Tax Paid Supplemental Data | | 1145000.0 | 1911000.0 | 1044000.0 | 1420000.0 | 1373000.0 |
| Interest Paid Supplemental Data | | 154911000.0 | 184201000.0 | 192101000.0 | 191135000.0 | 190511000.0 |
| Investing Cash Flow | | -929528000.0 | -289138000.0 | -276351000.0 | -237954000.0 | -150990000.0 |
| Issuance Of Capital Stock | 899053000.0 | 629552000.0 | 0.0 | 0.0 | | |
| Issuance Of Debt | | 0.0 | 0.0 | 301697000.0 | | 17020000.0 |
| Long Term Debt Issuance | | 0.0 | 0.0 | 301697000.0 | | 17020000.0 |
| Long Term Debt Payments | | -2672000.0 | -24669000.0 | -153615000.0 | -115250000.0 | -178323000.0 |
| Net Business Purchase And Sale | | -201412000.0 | -72395000.0 | -49335000.0 | -61636000.0 | -83031000.0 |
| Net Common Stock Issuance | | 580524000.0 | -25009000.0 | 0.0 | | -117811000.0 |
| Net Income From Continuing Operations | | 92579000.0 | 474488000.0 | 95877000.0 | 140854000.0 | 403715000.0 |
| Net Investment Properties Purchase And Sale | | -498363000.0 | 152044000.0 | 31118000.0 | 171872000.0 | 182679000.0 |
| Net Investment Purchase And Sale | | 0.0 | 14471000.0 | 4624000.0 | 0.0 | 0.0 |
| Net Issuance Payments Of Debt | | 77328000.0 | 83406000.0 | 29907000.0 | 337000.0 | -6203000.0 |
| Net Long Term Debt Issuance | | -2672000.0 | -24669000.0 | 148082000.0 | 186447000.0 | -161303000.0 |
| Net Other Financing Charges | | -58614000.0 | -52629000.0 | -66510000.0 | -70743000.0 | -53684000.0 |
| Net Other Investing Changes | | -75183000.0 | -85310000.0 | -32168000.0 | -143898000.0 | -112000000.0 |
| Net Short Term Debt Issuance | | 80000000.0 | 108075000.0 | -118175000.0 | -186110000.0 | 155100000.0 |
| Operating Cash Flow | | 820071000.0 | 832664000.0 | 876848000.0 | 877332000.0 | 902887000.0 |
| Operating Gains Losses | | -8072000.0 | -339942000.0 | 24213000.0 | 12750000.0 | -217383000.0 |
| Other Non Cash Items | | 31695000.0 | 9089000.0 | 27107000.0 | 29193000.0 | 32509000.0 |
| Preferred Stock Dividend Paid | | -4381000.0 | -4770000.0 | -4851000.0 | -4802000.0 | -4830000.0 |
| Provisionand Write Offof Assets | | 140000.0 | 702000.0 | 37456000.0 | | -213000.0 |
| Purchase Of Business | | -201412000.0 | -72395000.0 | -50335000.0 | -62636000.0 | -83031000.0 |
| Purchase Of Investment Properties | | -539171000.0 | -173723000.0 | -67532000.0 | -31693000.0 | -190866000.0 |
| Repayment Of Debt | | -2672000.0 | -24669000.0 | -153615000.0 | -115250000.0 | -178323000.0 |
| Repurchase Of Capital Stock | | -49028000.0 | -25009000.0 | 0.0 | | -117811000.0 |
| Sale Of Business | | 0.0 | | 1000000.0 | | 0.0 |
| Sale Of Investment | | 0.0 | 14471000.0 | 4624000.0 | 0.0 | 0.0 |
| Sale Of Investment Properties | | 40808000.0 | 325767000.0 | 98650000.0 | 203565000.0 | 373545000.0 |
| Stock Based Compensation | | 27505000.0 | 32896000.0 | 32625000.0 | 32204000.0 | 26484000.0 |