Overview Financials News + Filings Key Docs Charts Ownership Insiders
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| In millions, except per share items | Sep-30-22 | Sep-30-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 | Sep-30-16 | Sep-30-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Operating revenues | 4,201.7 | 3,407.5 | 2,821.1 | 2,901.8 | 3,115.5 | 2,759.7 | 2,454.6 | 2,927.0 |
| Operating revenues growth | 23.3% | 20.8% | -2.8% | -6.9% | 12.9% | 12.4% | -16.1% | -40.8% |
| Purchased gas cost | 1,682.7 | 1,032.7 | 658.9 | 858.8 | 1,167.8 | 240.4 | 221.8 | 230.3 |
| Operation and maintenance expense | 710.2 | 679.0 | 629.6 | 630.3 | 594.8 | 538.7 | 538.6 | 516.4 |
| Depreciation and amortization expense | 535.7 | 478.0 | 429.8 | 391.5 | 361.1 | 319.4 | 290.8 | 272.4 |
| Taxes, other than income | 352.2 | 312.8 | 278.8 | 275.2 | 263.9 | 240.4 | 221.8 | 230.3 |
| Operating income | 921.0 | 905.0 | 824.1 | 746.1 | 727.9 | 735.6 | 657.2 | 612.2 |
| Operating margin | 21.9% | 26.6% | 29.2% | 25.7% | 23.4% | 26.7% | 26.8% | 20.9% |
| Other non-operating income | 33.7 | -2.1 | 7.2 | 7.4 | -10.1 | -11.4 | -0.2 | -0.8 |
| Interest charges | -102.8 | -83.6 | -84.5 | -103.2 | -106.6 | -120.2 | -114.8 | -116.2 |
| Income tax expense | 77.5 | 153.7 | 145.4 | 138.9 | 8.1 | 221.4 | 196.6 | 189.5 |
| Net income | 774.4 | 665.6 | 601.4 | 511.4 | 603.1 | 396.4 | 350.1 | 315.1 |
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| Basic net income per share (USD per share) | $5.61 | $5.12 | $4.89 | $4.36 | $5.43 | $3.73 | $3.38 | $3.09 |
| Diluted net income per share (USD per share) | $5.60 | $5.12 | $4.89 | $4.35 | $5.43 | $3.73 | $3.38 | $3.09 |
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| Basic weighted average shares outstanding (in shares) | 137.8 | 129.8 | 122.8 | 117.2 | 111.0 | 106.1 | 103.5 | 101.9 |
| Diluted weighted average shares outstanding (in shares) | 138.1 | 129.8 | 122.9 | 117.5 | 111.0 | 106.1 | 103.5 | 101.9 |
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| Other comprehensive income (loss), net of tax | | | | | | | | |
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| Cash flow hedges: | | | | | | | | |
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