| Revenues | | 4,668.00 | 4,521.00 | 4,934.00 | 5,109.00 |
| | 471.00 | 498.00 | - | - |
| Other Operating Expenses | | 471.00 | 498.00 | - | - |
| Interest Income/Expense | | 44.00 | 37.00 | 38.00 | 37.00 |
| Benefits Costs and Expenses | | 3,493.00 | 3,412.00 | 3,547.00 | 3,606.00 |
| Costs And Expenses | | 3,493.00 | 3,412.00 | 3,547.00 | 3,606.00 |
| Income/Loss From Equity Method Investments | | 196.00 | 160.00 | 155.00 | 134.00 |
| Income Tax Expense/Benefit | | 164.00 | 98.00 | 210.00 | 215.00 |
| | 1,057.00 | 1,047.00 | 1,238.00 | 1,350.00 |
| Attributable To Parent | | 1,057.00 | 1,047.00 | 1,238.00 | 1,350.00 |
| Available To Common Stockholders, Basic | | 1,047.00 | 1,037.00 | 1,228.00 | 1,340.00 |
| Preferred Stock Dividends And Other Adjustments | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 |
| Basic Average Shares | | 343.20 | 353.20 | -3.00 | 369.00 |
| Diluted Average Shares | | 348.80 | 359.70 | -3.20 | 376.10 |
| Basic Earnings Per Share | 3.05 | 3.05 | 2.94 | 3.40 | 3.63 |
| Diluted Earnings Per Share | 3.00 | 3.00 | 2.88 | 3.34 | 3.56 |
