| In millions, except per share items | Sep-30-22 | Jun-30-22 | Mar-31-22 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| OPERATING REVENUES | 1,846.7 | 1,346.7 | 1,167.4 | 1,580.1 | 1,208.1 | 1,462.4 | 1,066.1 | 1,483.5 |
| OPERATING REVENUES growth | 16.9% | 11.5% | -20.2% | 6.5% | 5.4% | 34.7% | -0.7% | -5.3% |
| OPERATING EXPENSES: | | | | | | | | |
| Fuel and purchased power | 643.0 | 414.3 | 309.0 | 355.8 | 284.1 | 635.1 | 266.5 | 316.2 |
| SPP network transmission costs | 81.6 | 81.5 | 78.7 | 73.6 | 73.8 | 69.4 | 65.4 | 66.1 |
| Operating and maintenance | 266.2 | 282.8 | 252.2 | 265.2 | 259.9 | 275.5 | 297.5 | 304.6 |
| Depreciation and amortization | 233.2 | 232.1 | 229.0 | 225.0 | 225.2 | 219.3 | 222.0 | 218.0 |
| Taxes other than income tax | 100.7 | 100.3 | 101.9 | 96.2 | 97.9 | 94.9 | 90.0 | 91.0 |
| Estimated impairment loss on Sibley Unit 3 | 6.0 | | | | | | | |
| Total Operating Expenses | 1,330.7 | 1,111.0 | 970.8 | 1,015.8 | 940.9 | 1,294.2 | 941.4 | 995.9 |
| INCOME FROM OPERATIONS | 578.4 | 335.5 | 253.1 | 600.7 | 295.3 | 317.7 | 153.0 | 521.7 |
| Operating margin | 31.3% | 24.9% | 21.7% | 38.0% | 24.4% | 21.7% | 14.4% | 35.2% |
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| OTHER INCOME (EXPENSE): | | | | | | | | |
| Investment earnings | 13.1 | -0.9 | -9.6 | 8.8 | 8.4 | 1.6 | 6.8 | 1.7 |
| Other income | 6.2 | 5.9 | 8.2 | 11.0 | 14.7 | 11.2 | 14.3 | 7.1 |
| Other expense | -16.7 | -22.9 | -24.9 | -19.2 | -18.8 | -20.9 | -20.5 | -20.1 |
| Total Other Income (Expense), Net | 19.3 | 5.0 | -26.3 | 19.8 | 23.1 | 12.8 | 21.1 | 8.8 |
| Interest expense | -102.3 | -99.3 | -91.8 | -93.6 | -93.8 | -94.0 | -93.4 | -94.8 |
| INCOME BEFORE INCOME TAXES | 478.7 | 218.3 | 135.0 | 507.7 | 205.8 | 215.6 | 60.2 | 415.6 |
| Income tax expense | 49.5 | 22.1 | 11.5 | 57.2 | 19.6 | 23.0 | 8.4 | 50.0 |
| Tax rate | 10.3% | 10.1% | 8.5% | 11.3% | 9.5% | 10.7% | 14.0% | 12.0% |
| Equity in earnings of equity method investees, net of income taxes | 2.0 | 1.4 | 2.1 | 2.0 | 2.1 | 2.0 | 2.2 | 1.9 |
| NET INCOME | 431.2 | 197.6 | 125.6 | 452.5 | 188.3 | 194.6 | 54.0 | 367.5 |
| Less: Net income attributable to noncontrolling interests | 3.0 | 3.1 | 3.1 | 3.1 | 3.0 | 3.0 | 3.0 | 3.0 |
| Net income attributable to Evergy, Inc. | 428.2 | 194.5 | 122.5 | 449.4 | 185.3 | 191.6 | 51.0 | 364.5 |
| |
| BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO EVERGY, INC. | | | | | | | | |
| Basic earnings per common share (in dollars per share) | $1.86 | $0.85 | $0.53 | $1.96 | $0.81 | $0.84 | $0.22 | $1.60 |
| Diluted earnings per common share (in dollars per share) | $1.86 | $0.84 | $0.53 | $1.95 | $0.81 | $0.84 | $0.23 | $1.60 |
| |
| AVERAGE COMMON SHARES OUTSTANDING | | | | | | | | |
| Basic (in shares) | 229.9 | 229.9 | 229.8 | 229.7 | 229.3 | 227.3 | 227.2 | 227.3 |
| Diluted (in shares) | 230.6 | 230.4 | 230.2 | 230.2 | 229.7 | 227.6 | 227.5 | 227.5 |
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| COMPREHENSIVE INCOME | | | | | | | | |
| NET INCOME | 431.2 | 197.6 | 125.6 | 452.5 | 188.3 | 194.6 | 54.0 | 367.5 |
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| Derivative hedging activity | | | | | | | | |
| Gain on derivative hedging instruments | | | | | | | | |
| Income tax benefit | | | | | | | | |
| Net gain on derivative hedging instruments | | | | | | | | |
| Reclassification to expenses, net of tax | 1.4 | 1.3 | 1.4 | 1.3 | 1.4 | 1.4 | 1.3 | 1.4 |
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| Defined benefit pension plans | | | | | | | | |
| Net loss arising during period | | | | | | | | |
| Income tax expense | | | | | | | | |
| Net gain arising during period, net of tax | | | | | | | | |
| Amortization of net losses included in net periodic benefit costs, net of tax | | 0.1 | | | | | | |
| |
| Change in unrecognized pension expense, net of tax | | | | | | | | |
| Total other comprehensive income | | | | | | | | |
| COMPREHENSIVE INCOME | | | | | | | | |