CMS Energy Corporation Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 247	$ 173	$ 692	$ 557
Retirement Benefits Liability
Net gain arising during the period	0	0	0	1
Amortization of net actuarial loss	0	0	1	1
Amortization of prior service credit	0	0	0	(1)
Other Comprehensive Income	0	0	1	1
Comprehensive Income	247	173	693	558
Comprehensive Loss Attributable to Noncontrolling Interests	(6)	(3)	(46)	(21)
Comprehensive Income	$ 253	$ 176	$ 739	$ 579