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Schedule I - Income Statements (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income statements |  |  |
Other income, net | $ 177.7 | $ 128.8 | $ 133.2
Interest expense | 726.9 | 515.1 | 471.1
Loss on debt extinguishment | 0.0 | 0.0 | 36.3
Income before income taxes | 1,536.3 | 1,732.6 | 1,498.8
Income tax benefit | (204.6) | (322.9) | (200.3)
Net income attributed to common shareholders | 1,331.7 | 1,408.1 | 1,300.3
WEC Energy Group |  |  |
Income statements |  |  |
Operating expenses (income) | 2.5 | (1.6) | 12.0
Equity earnings of subsidiaries | 1,502.5 | 1,473.0 | 1,367.0
Other income, net | 19.6 | 2.4 | 1.7
Interest expense | 260.8 | 109.6 | 70.2
Loss on debt extinguishment | 0.0 | 0.0 | 23.1
Income before income taxes | 1,258.8 | 1,367.4 | 1,263.4
Income tax benefit | 72.9 | 40.7 | 36.9
Net income attributed to common shareholders | $ 1,331.7 | $ 1,408.1 | $ 1,300.3

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