| Revenues | | 15,526.00 | 15,690.00 | 17,888.00 | 13,726.00 |
| Benefits Costs and Expenses | | 14,793.00 | 14,476.00 | 16,106.00 | 12,986.00 |
| Costs And Expenses | | 14,793.00 | 14,476.00 | 16,106.00 | 12,986.00 |
| Income/Loss From Equity Method Investments | | 2.00 | -4.00 | 83.00 | 21.00 |
| Income/Loss From Continuing Operations Before Tax | | 733.00 | 1,214.00 | 1,782.00 | 740.00 |
| Income Tax Expense/Benefit | | 129.00 | 269.00 | 382.00 | 195.00 |
| | 606.00 | 941.00 | 1,483.00 | 566.00 |
| Attributable To Parent | | 597.00 | 905.00 | 1,431.00 | 533.00 |
| Available To Common Stockholders, Basic | | 588.00 | 895.00 | 1,416.00 | 527.00 |
| | 9.00 | - | - | - |
| Redeemable Noncontrolling Interest | | 9.00 | - | - | - |
| Basic Average Shares | | 347.70 | -1.00 | 351.10 | 353.10 |
| Diluted Average Shares | | 349.40 | -1.00 | 353.00 | 354.90 |
| Basic Earnings Per Share | | 1.69 | 2.57 | 4.03 | 1.49 |
| Diluted Earnings Per Share | | 1.68 | 2.55 | 4.01 | 1.48 |
| Common Stock Dividends | 1.40 | 1.40 | 1.35 | 1.35 | 1.35 |
| Undistributed Earnings/Loss Allocated To Participating Securities, Basic | | 9.00 | 10.00 | 15.00 | 6.00 |
