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Consumers Energy Company Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
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