Consumers Energy Company Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Income	$ 887	$ 837	$ 1,353
Retirement Benefits Liability
Net gain (loss) arising during the period	5	1	19
Amortization of net actuarial loss, net of tax	2	4	5
Other Comprehensive Income	6	7	27
Comprehensive Income Attributable to CMS Energy	893	844	1,380
Consumers Energy Company
Net Income	867	945	868
Retirement Benefits Liability
Net gain (loss) arising during the period	(1)	15	2
Amortization of net actuarial loss, net of tax	1	2	2
Other Comprehensive Income	0	17	4
Comprehensive Income Attributable to CMS Energy	$ 867	$ 962	$ 872