| Revenues | | 19,154.00 | 19,074.00 | 23,814.00 | 17,361.00 |
| Operating Expenses | | 3,844.00 | 3,798.00 | 3,682.00 | 3,509.00 |
| Benefits Costs and Expenses | | 18,119.00 | 17,567.00 | 22,697.00 | 16,151.00 |
| Costs And Expenses | | 18,119.00 | 17,567.00 | 22,697.00 | 16,151.00 |
| Operating Income/Loss | | 1,604.00 | 1,631.00 | 1,679.00 | 1,650.00 |
| | 292.00 | 265.00 | 263.00 | 271.00 |
| Interest And Debt Expense | | 292.00 | 265.00 | 263.00 | 271.00 |
| Income/Loss From Equity Method Investments | | 282.00 | 533.00 | 429.00 | 620.00 |
| Income/Loss From Continuing Operations Before Tax | | 1,035.00 | 1,507.00 | 1,117.00 | 1,210.00 |
| Income Tax Expense/Benefit | | 256.00 | 345.00 | 301.00 | 308.00 |
| | 779.00 | 1,162.00 | 816.00 | 902.00 |
| Attributable To Parent | | 736.00 | 1,185.00 | 809.00 | 896.00 |
| Available To Common Stockholders, Basic | | 705.00 | 1,140.00 | 778.00 | 818.00 |
| Attributable To Noncontrolling Interest | | 43.00 | -23.00 | 7.00 | 6.00 |
| Basic Average Shares | | 642.60 | 652.00 | -3.60 | 664.70 |
| Diluted Average Shares | | 646.90 | 655.70 | -3.70 | 669.10 |
| Basic Earnings Per Share | | 1.10 | 1.75 | 1.18 | 1.23 |
| Diluted Earnings Per Share | | 1.09 | 1.74 | 1.17 | 1.22 |
| Common Stock Dividends | 0.59 | 0.59 | 0.57 | 0.57 | 0.57 |
