CMS Energy Corporation Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Other Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retirement benefits liability	Derivative instruments	Retained Earnings	Cumulative Preferred Stock	Noncontrolling Interests
Total Equity at Beginning of Period at Dec. 31, 2021	$ 7,188	$ 3	$ 5,406	$ (59)	$ (56)	$ (3)	$ 1,057		$ 557
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued			10
Common stock repurchased			(10)
Net gain arising during the period	2				2
Amortization of net actuarial loss	1				1
Unrealized gain on derivative instruments	2					2
Net Income	345						353		(8)
Dividends declared on common stock							(133)
Dividends declared on preferred stock							(2)
Contribution from noncontrolling interest									2
Distributions and other changes in noncontrolling interests									0
Total Equity at End of Period at Mar. 31, 2022	$ 7,405	3	5,406	(54)	(53)	(1)	1,275	$ 224	551
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 0.4600
Dividends declared per preferred stock Series C depositary share (in dollars per share)	$ 0.2625
Total Equity at Beginning of Period at Dec. 31, 2022	$ 7,595	3	5,490	(52)	(52)	0	1,350		580
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued			11
Common stock repurchased			(7)
Net gain arising during the period	1				1
Amortization of net actuarial loss	0				0
Unrealized gain on derivative instruments	0					0
Net Income	194						204		(10)
Dividends declared on common stock							(142)
Dividends declared on preferred stock							(2)
Contribution from noncontrolling interest									6
Distributions and other changes in noncontrolling interests									(4)
Total Equity at End of Period at Mar. 31, 2023	$ 7,652	$ 3	$ 5,494	$ (51)	$ (51)	$ 0	$ 1,410	$ 224	$ 572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 0.4875
Dividends declared per preferred stock Series C depositary share (in dollars per share)	$ 0.2625