Consumers Energy Company Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Other Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Cumulative Preferred Stock	Consumers Energy Company	Consumers Energy Company Common Stock	Consumers Energy Company Other Paid-in Capital	Consumers Energy Company Accumulated Other Comprehensive Loss	Consumers Energy Company Retained Earnings	Consumers Energy Company Cumulative Preferred Stock
Total Equity at Beginning of Period at Dec. 31, 2022	$ 7,595	$ 3	$ 5,490		$ 1,350	$ 224	$ 10,155	$ 841	$ 7,284	$ (15)	$ 2,008	$ 37
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholder contribution									475
Return of stockholder contribution									0
Net Income	402						399				399
Dividends declared on common stock					(284)						(305)
Dividends declared on preferred stock					(5)						(1)
Total Equity at End of Period at Jun. 30, 2023	7,706	3	5,506	$ (51)	1,463	224	10,723	841	7,759	(15)	2,101	37
Total Equity at Beginning of Period at Mar. 31, 2023	7,652	3	5,494		1,410		10,175	841	7,359	(15)	1,953	37
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholder contribution									400
Return of stockholder contribution									0
Net Income	198						167				167
Dividends declared on common stock					(142)						(18)
Dividends declared on preferred stock					(3)						(1)
Total Equity at End of Period at Jun. 30, 2023	7,706	3	5,506	(51)	1,463	224	10,723	841	7,759	(15)	2,101	37
Total Equity at Beginning of Period at Dec. 31, 2023	8,125	3	5,705		1,658	224	10,800	841	7,759	(15)	2,178	37
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholder contribution									320
Return of stockholder contribution									(320)
Net Income	485						453				453
Dividends declared on common stock					(308)						(359)
Dividends declared on preferred stock					(5)						(1)
Total Equity at End of Period at Jun. 30, 2024	8,541	3	5,991	(45)	1,830	224	10,893	841	7,759	(15)	2,271	37
Total Equity at Beginning of Period at Mar. 31, 2024	8,506	3	5,975		1,789		10,810	841	7,759	(15)	2,188	37
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholder contribution									0
Return of stockholder contribution									0
Net Income	198						178				178
Dividends declared on common stock					(154)						(94)
Dividends declared on preferred stock					(3)						(1)
Total Equity at End of Period at Jun. 30, 2024	$ 8,541	$ 3	$ 5,991	$ (45)	$ 1,830	$ 224	$ 10,893	$ 841	$ 7,759	$ (15)	$ 2,271	$ 37