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Schedule I - Income Statements (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income statements |  |  |
Other income, net | $ 128.8 | $ 133.2 | $ 79.5
Interest expense | 515.1 | 471.1 | 493.7
Loss on debt extinguishment | 0.0 | 36.3 | 38.4
Income before income taxes | 1,732.6 | 1,498.8 | 1,429.3
Income tax benefit | (322.9) | (200.3) | (227.9)
Net income attributed to common shareholders | 1,408.1 | 1,300.3 | 1,199.9
WEC Energy Group |  |  |
Income statements |  |  |
Operating expenses (income) | (1.6) | 12.0 | 5.3
Equity earnings of subsidiaries | 1,473.0 | 1,367.0 | 1,283.8
Other income, net | 2.4 | 1.7 | 1.3
Interest expense | 109.6 | 70.2 | 96.9
Loss on debt extinguishment | 0.0 | 23.1 | 38.4
Income before income taxes | 1,367.4 | 1,263.4 | 1,144.5
Income tax benefit | 40.7 | 36.9 | 55.4
Net income attributed to common shareholders | $ 1,408.1 | $ 1,300.3 | $ 1,199.9

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