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Consumers Energy Company Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Amortization of net actuarial loss, tax | $ (1) | $ (1) | $ (1) | $ (1)
Consumers Energy Company |  |  |  |
Amortization of net actuarial loss, tax | $ 0 | $ 0 | $ 0 | $ 0

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