Overview Financials News + Filings Key Docs Charts Ownership Insiders
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| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 2,578.0 | 1,808.6 | 1,530.3 | 1,652.7 | 1,633.7 | 1,539.6 | 1,427.2 | 1,547.7 |
| Revenues growth | 42.5% | 18.2% | -7.4% | 1.2% | 6.1% | 7.9% | -7.8% | -14.9% |
| Cost of natural gas | 1,459.1 | 775.0 | 537.4 | | | | | |
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| Operating expenses | | | | | | | | |
| Operations and maintenance | 472.3 | 449.7 | 431.1 | 429.1 | 411.7 | 399.3 | 397.3 | 414.5 |
| Depreciation and amortization | 228.5 | 207.2 | 194.9 | 180.4 | 160.1 | 151.9 | 143.8 | 133.0 |
| General taxes | 68.2 | 66.4 | 63.3 | 60.0 | 58.9 | 57.2 | 55.3 | 55.1 |
| Total operating expenses | 769.0 | 723.3 | 689.3 | 669.5 | 630.7 | 608.4 | 596.5 | 602.6 |
| Operating income | 350.0 | 310.3 | 303.5 | 295.3 | 288.4 | 316.7 | 288.9 | 239.1 |
| Operating margin | 13.6% | 17.2% | 19.8% | 17.9% | 17.7% | 20.6% | 20.2% | |
| Other expense, net | -4.2 | -3.2 | -3.0 | -3.0 | -11.4 | -14.5 | -19.9 | 2.6 |
| Interest expense, net | -77.5 | -60.3 | -62.5 | -62.7 | -51.3 | -46.1 | -43.7 | -44.6 |
| Income before income taxes | 268.3 | 246.8 | 238.0 | 229.6 | 225.8 | 256.1 | 225.3 | 192.0 |
| Income taxes | -46.5 | -40.3 | -41.6 | -42.9 | -53.5 | -93.1 | -85.2 | -73.0 |
| Net income | 221.7 | 206.4 | 196.4 | 186.7 | 172.2 | 163.0 | 140.1 | 119.0 |
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| Earnings per share | | | | | | | | |
| Basic | $4.09 | $3.85 | $3.70 | $3.53 | $3.27 | $3.10 | $2.67 | $2.26 |
| Diluted | $4.08 | $3.85 | $3.68 | $3.51 | $3.25 | $3.08 | $2.65 | $2.24 |
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| Average shares (thousands) | | | | | | | | |
| Basic | 54.2 | 53.6 | 53.1 | 52.9 | 52.7 | 52.5 | 52.5 | 52.6 |
| Diluted | 54.3 | 53.7 | 53.4 | 53.2 | 53.0 | 53.0 | 53.0 | 53.3 |
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| Common Stock, Dividends, Per Share, Declared | $2.48 | $2.32 | $2.16 | $2.00 | $1.84 | $1.68 | $1.40 | $1.20 |
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