| Period End Date | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
|---|---|---|---|---|---|
| Period Length | 3 Months | 3 Months | 3 Months | 3 Months | 3 Months |
| Revenues | 0.75%127.82 | 128.79 | 142.09 | 132.45 | 139.37 |
| Operating Expenses | 25.39%64.59 | 86.57 | 62.22 | -16.52 | -31.29 |
| Benefits Costs and Expenses | 14.47%64.59 | 75.52 | 62.22 | -16.52 | -31.29 |
| Costs And Expenses | 14.47%64.59 | 75.52 | 62.22 | -16.52 | -31.29 |
| Other Operating Income/Expenses | 8.44%3.83 | 3.53 | - | - | - |
| Operating Income/Loss | 49.75%63.23 | 42.22 | 43.95 | 47.85 | 170.65 |
2.08%15.66 | 16.00 | 17.02 | 14.67 | 18.92 | |
| Interest And Debt Expense | 2.08%15.66 | 16.00 | 17.02 | 14.67 | 18.92 |
| Income/Loss Before Equity Method Investments | 151.62%-62.34 | 120.77 | 136.77 | 126.46 | 130.26 |
| Income/Loss From Equity Method Investments | 28.48%5.74 | 8.02 | 5.32 | 5.99 | 9.11 |
| Income/Loss From Continuing Operations Before Tax | 18.69%63.23 | 53.27 | 79.87 | 148.97 | 170.65 |
| Income Tax Expense/Benefit | 110.10%0.01 | -0.10 | 0.68 | 0.78 | 2.02 |
| Income/Loss From Continuing Operations After Tax | 74.69%63.23 | 36.20 | 32.92 | 39.92 | 170.65 |
18.69%63.23 | 53.27 | 79.87 | 148.97 | 170.65 | |
| Attributable To Parent | 38.45%59.51 | 42.98 | 78.29 | 146.82 | 167.97 |
| Available To Common Stockholders, Basic | 38.45%59.51 | 42.98 | 78.29 | 146.82 | 167.97 |
| Preferred Stock Dividends And Other Adjustments | - | - | - | - | - |
| Attributable To Noncontrolling Interest | 77.91%1.90 | 8.60 | 1.58 | 0.50 | 2.69 |
| Basic Average Shares | 100.00%- | 127.53 | 127.51 | 127.93 | 0.02 |
| Diluted Average Shares | 101.13%-1.45 | 128.32 | 129.75 | 130.14 | 0.01 |
| Basic Earnings Per Share | 38.24%0.47 | 0.34 | 0.61 | 1.15 | 1.31 |
| Diluted Earnings Per Share | 35.29%0.46 | 0.34 | 0.61 | 1.13 | 1.30 |
| Common Stock Dividends | 47.50%0.21 | 0.40 | 0.40 | 0.40 | -0.41 |
| Participating Securities, Distributed And Undistributed Earnings/Loss, Basic | - | - | - | - | - |