| Period End Date | 2026-06-30 | 2026-03-31 | 2025-12-31 | 2025-09-30 | 2025-06-30 |
|---|---|---|---|---|---|
| Period Length | 3 Months | 3 Months | 3 Months | 3 Months | 3 Months |
| Revenues | 1.00%3,454.20 | 3,420.10 | 3,350.40 | 3,231.50 | 3,158.40 |
| Benefits Costs and Expenses | 0.23%3,077.30 | 3,084.50 | 3,066.90 | 2,900.30 | 2,869.40 |
| Costs And Expenses | 0.23%3,077.30 | 3,084.50 | 3,066.90 | 2,900.30 | 2,869.40 |
| Income/Loss From Continuing Operations Before Tax | 12.31%376.90 | 335.60 | 283.50 | 331.20 | 289.00 |
| Income Tax Expense/Benefit | 27.32%78.30 | 61.50 | 58.30 | 65.60 | 53.70 |
8.94%298.60 | 274.10 | 225.20 | 265.60 | 235.30 | |
| Attributable To Parent | 8.94%298.60 | 274.10 | 225.20 | 265.60 | 235.30 |
| Available To Common Stockholders, Basic | 9.01%296.30 | 271.80 | 217.50 | 265.60 | 235.30 |
| Basic Average Shares | 0.37%49.52 | 49.70 | -0.61 | 50.83 | 51.14 |
| Diluted Average Shares | 0.73%49.83 | 50.20 | -0.52 | 51.32 | 51.57 |
| Basic Earnings Per Share | 9.32%5.98 | 5.47 | 4.47 | 5.22 | 4.60 |
| Diluted Earnings Per Share | 9.98%5.95 | 5.41 | 4.38 | 5.17 | 4.56 |
| Common Stock Dividends | 0.88 | 0.88 | 0.88 | 0.80 | 0.80 |
| Undistributed Earnings/Loss Allocated To Participating Securities, Basic | 2.30 | 2.30 | - | - | - |