Consumers Energy Company Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts receivable and accrued revenue, allowance	$ 23	$ 21
Common stock authorized (in shares)	350.0	350.0
Common stock outstanding (in shares)	298.8	294.4
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock authorized (in shares)	10.0
Consumers Energy Company
Accounts receivable and accrued revenue, allowance	$ 23	$ 21
Common stock authorized (in shares)	125.0	125.0
Common stock outstanding (in shares)	84.1	84.1
Preferred stock, par value (in dollars per share)	$ 4.50	$ 4.50
Preferred stock authorized (in shares)	7.5	7.5
Preferred stock outstanding (in shares)	0.4	0.4