Consumers Energy Company Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income	$ 1,330	$ 752	$ 682
Retirement Benefits Liability
Net loss arising during the period, net of tax	19	(15)	(7)
Amortization of net actuarial loss, net of tax	5	5	3
Other Comprehensive Income (Loss)	27	(13)	(8)
Comprehensive Income	1,357	739	674
Consumers Energy Company
Net Income	868	816	743
Retirement Benefits Liability
Net loss arising during the period, net of tax	2	(9)	(8)
Amortization of net actuarial loss, net of tax	2	1	1
Other Comprehensive Income (Loss)	4	(8)	(7)
Comprehensive Income	$ 872	$ 808	$ 736