| Revenues | | 19,074.00 | 23,814.00 | 17,361.00 | 17,340.00 |
| Operating Expenses | | 3,798.00 | 3,682.00 | 3,509.00 | 3,319.00 |
| Benefits Costs and Expenses | | 17,567.00 | 22,697.00 | 16,151.00 | 16,360.00 |
| Costs And Expenses | | 17,567.00 | 22,697.00 | 16,151.00 | 16,360.00 |
| Operating Income/Loss | | 1,631.00 | 1,679.00 | 1,650.00 | 1,393.00 |
| | 265.00 | 263.00 | 271.00 | 269.00 |
| Interest And Debt Expense | | 265.00 | 263.00 | 271.00 | 269.00 |
| Income/Loss From Equity Method Investments | | 533.00 | 429.00 | 620.00 | 238.00 |
| Income/Loss From Continuing Operations Before Tax | | 1,507.00 | 1,117.00 | 1,210.00 | 980.00 |
| Income Tax Expense/Benefit | | 345.00 | 301.00 | 308.00 | 245.00 |
| | 1,162.00 | 816.00 | 902.00 | 735.00 |
| Attributable To Parent | | 1,185.00 | 809.00 | 896.00 | 729.00 |
| Available To Common Stockholders, Basic | | 1,140.00 | 778.00 | 818.00 | 698.00 |
| Attributable To Noncontrolling Interest | | -23.00 | 7.00 | 6.00 | 6.00 |
| Basic Average Shares | | 652.00 | - | 664.70 | 670.80 |
| Diluted Average Shares | | 655.70 | - | 669.10 | 675.00 |
| Basic Earnings Per Share | | 1.75 | - | 1.23 | 1.04 |
| Diluted Earnings Per Share | | 1.74 | - | 1.22 | 1.03 |
| Common Stock Dividends | | 0.57 | - | 0.57 | 0.57 |