CMS Energy Corporation Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 194	$ 345
Retirement Benefits Liability
Net gain arising during the period	1	2
Amortization of net actuarial loss, net of tax	0	1
Derivatives
Unrealized gain on derivative instruments, net of tax	0	2
Other Comprehensive Income	1	5
Comprehensive Income	195	350
Comprehensive Loss Attributable to Noncontrolling Interests	(10)	(8)
Comprehensive Income Attributable to CMS Energy	$ 205	$ 358