CMS Energy Corporation Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 263	$ 194
Retirement Benefits Liability
Net gain arising during the period	0	1
Amortization of net actuarial loss, net of tax	1	0
Other Comprehensive Income	1	1
Comprehensive Income	264	195
Comprehensive Loss Attributable to Noncontrolling Interests	(24)	(10)
Comprehensive Income Attributable to CMS Energy	$ 288	$ 205