Consumers Energy Company Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Other Paid-in Capital	Accumulated Other Comprehensive Income (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 Income (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									75
Return of stockholder contribution									0
Net Income	204						232				232
Dividends declared on common stock					(142)						(287)
Total Equity at End of Period at Mar. 31, 2023	7,652	3	5,494	$ (51)	1,410	224	10,175	841	7,359	(15)	1,953	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	287						275				275
Dividends declared on common stock					(154)						(265)
Total Equity at End of Period at Mar. 31, 2024	$ 8,506	$ 3	$ 5,975	$ (45)	$ 1,789	$ 224	$ 10,810	$ 841	$ 7,759	$ (15)	$ 2,188	$ 37