| Operating Revenue | 811.8 | 696.7 | 710.2 | 590.79 | 505.27 | |
| Other Revenue | -24.6 | -26.1 | -29.5 | -20.82 | -17.07 | |
| Revenue | 787.2 | 670.6 | 680.7 | 569.97 | 488.2 | |
| Revenue Growth (YoY) | 17.39% | -1.48% | 19.43% | 16.75% | 1.79% | |
| Operations & Maintenance | 229.6 | 195.8 | 179.8 | 165.09 | 157.64 | |
| Selling, General & Admin | 3 | 3 | 2.9 | - | - | |
| Depreciation & Amortization | 65.7 | 65.5 | 69 | 62.66 | 58.12 | |
| Other Operating Expenses | 256.6 | 245.4 | 285.1 | 210.2 | 160.06 | |
| Total Operating Expenses | 554.9 | 509.7 | 536.8 | 437.95 | 375.82 | |
| Operating Income | 232.3 | 160.9 | 143.9 | 132.02 | 112.38 | |
| Interest Expense | -68.4 | -36.9 | -24.4 | -20.14 | -21.77 | |
| Net Interest Expense | -68.4 | -36.9 | -24.4 | -20.14 | -21.77 | |
| Other Non-Operating Income (Expenses) | -2.5 | 0.9 | -3.4 | -8.21 | -2.8 | |
| EBT Excluding Unusual Items | 161.4 | 124.9 | 116.1 | 103.67 | 87.81 | |
| Total Merger & Restructuring Charges | -4 | -10.4 | - | - | - | |
| Gain (Loss) on Sale of Assets | 4.4 | 0.8 | 7.5 | 9.03 | 6.24 | |
| Other Unusual Items | - | - | - | - | 0.13 | |
| Pretax Income | 161.8 | 115.3 | 123.6 | 112.7 | 94.18 | |
| Income Tax Expense | 43.2 | 28.1 | 33.8 | 29.23 | 23.54 | |
| Earnings From Continuing Ops. | 118.6 | 87.2 | 89.8 | 83.47 | 70.64 | |
| Earnings From Discontinued Ops. | - | - | - | - | 0.86 | |
| Net Income | 118.6 | 87.2 | 89.8 | 83.47 | 71.5 | |
| Net Income to Common | 118.6 | 87.2 | 89.8 | 83.47 | 71.5 | |
| Net Income Growth | 36.01% | -2.90% | 7.59% | 16.74% | 9.74% | |
| Shares Outstanding (Basic) | 22 | 18 | 18 | 18 | 17 | |
| Shares Outstanding (Diluted) | 23 | 18 | 18 | 18 | 17 | |
| Shares Change (YoY) | 22.22% | 3.54% | 0.97% | 5.14% | 1.96% | |
| EPS (Basic) | 5.28 | 4.75 | 5.07 | 4.75 | 4.28 | |
| EPS (Diluted) | 5.26 | 4.73 | 5.04 | 4.73 | 4.26 | |
| EPS Growth | 11.21% | -6.15% | 6.55% | 11.01% | 7.43% | |
| Free Cash Flow | -115.9 | 14.9 | 30.6 | -36.42 | -6.6 | |
| Free Cash Flow Per Share | -5.14 | 0.81 | 1.72 | -2.06 | -0.39 | |
| Dividend Per Share | 2.510 | 2.305 | 2.085 | 1.880 | 1.725 | |
| Dividend Growth | 8.89% | 10.55% | 10.90% | 8.99% | 8.83% | |
| Profit Margin | 15.07% | 13.00% | 13.19% | 14.64% | 14.64% | |
| Free Cash Flow Margin | -14.72% | 2.22% | 4.50% | -6.39% | -1.35% | |
| EBITDA | 313.8 | 238.3 | 223.9 | 204.91 | 180.09 | |
| EBITDA Margin | 39.86% | 35.53% | 32.89% | 35.95% | 36.89% | |
| D&A For EBITDA | 81.5 | 77.4 | 80 | 72.89 | 67.72 | |
| EBIT | 232.3 | 160.9 | 143.9 | 132.02 | 112.38 | |
| EBIT Margin | 29.51% | 23.99% | 21.14% | 23.16% | 23.02% | |
| Effective Tax Rate | 26.70% | 24.37% | 27.35% | 25.94% | 24.99% | |
| Revenue as Reported | - | - | - | 569.97 | 488.2 | |