| Revenues | | 1,854.00 | 2,063.00 | 2,331.00 | 1,924.00 |
| | 556.00 | - | - | - |
| Selling, General, and Administrative | | 556.00 | - | - | - |
| Other Operating Expenses | 72.00 | 72.00 | - | - | - |
| Interest Income/Expense | | 23.00 | 23.00 | 19.00 | 19.00 |
| Benefits Costs and Expenses | | 1,615.00 | 1,684.00 | 2,063.00 | 1,695.00 |
| Costs And Expenses | | 1,615.00 | 1,684.00 | 2,063.00 | 1,695.00 |
| Operating Income/Loss | | 239.00 | 379.00 | 268.00 | 229.00 |
| Income/Loss From Equity Method Investments | | 18.00 | 22.00 | 27.00 | -6.00 |
| Income Tax Expense/Benefit | | 48.00 | 80.00 | 53.00 | 55.00 |
| | 191.00 | 299.00 | 215.00 | 174.00 |
| Attributable To Parent | | 191.00 | 299.00 | 215.00 | 174.00 |
| Basic Average Shares | | 83.30 | -0.10 | 83.40 | 83.50 |
| Diluted Average Shares | | 83.30 | -0.10 | 83.40 | 83.50 |
| Basic Earnings Per Share | | 2.29 | 3.58 | 2.58 | 2.07 |
| Diluted Earnings Per Share | | 2.29 | 3.58 | 2.58 | 2.07 |
| Common Stock Dividends | | 2.38 | 2.88 | 0.80 | 0.80 |