XML 151 R119.htm IDEA: XBRL DOCUMENT v3.24.0.1
Earnings Per Share - CMS Energy (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
May 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Principal (In Millions) $ 3,556  
CMS Energy    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Principal (In Millions) 800  
CMS Energy | 3.375% Convertible Senior Notes Due 2028 | Convertible debt    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Principal (In Millions) $ 800 $ 800