Consumers Energy Company Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accounts receivable and accrued revenue, allowance	$ 26	$ 20
Common stock authorized (in shares)	350,000,000.0	350,000,000.0
Common stock outstanding (in shares)	290,300,000	289,800,000
Consumers Energy Company
Accounts receivable and accrued revenue, allowance	$ 26	$ 20
Common stock authorized (in shares)	125,000,000.0	125,000,000.0
Common stock outstanding (in shares)	84,100,000	84,100,000
Preferred stock authorized (in shares)	7,500,000	7,500,000
Preferred stock outstanding (in shares)	400,000	400,000