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Quarterly Financial And Common Stock Information (Tables)
12 Months Ended
Dec. 31, 2021
Quarterly Financial Data [Abstract]  
Schedule of Quarterly Financial Information Table
In Millions, Except Per Share Amounts
2021
Three Months EndedMarch 31June 30September 30December 31
CMS Energy, including Consumers
Operating revenue$2,013 $1,558 $1,725 $2,033 
Operating income430 252 260 204 
Income From Continuing Operations308 153 153 114 
Income From Discontinued Operations, Net of Tax34 18 30 520 
Net income342 171 183 634 
Loss attributable to noncontrolling interests(7)(5)(6)(5)
Net Income Attributable to CMS Energy349 176 189 639 
Preferred Stock Dividends— — 
Net income available to common stockholders349 176 186 637 
Basic earnings per average common share
Income from continuing operations per average common share available to common stockholders1
1.09 0.55 0.54 0.40 
Income from discontinued operations per average common share available to common stockholders1
0.12 0.06 0.10 1.80 
Basic earnings per average common share1
1.21 0.61 0.64 2.20 
Diluted earnings per average common share
Income from continuing operations per average common share available to common stockholders1
1.09 0.55 0.54 0.40 
Income from discontinued operations per average common share available to common stockholders1
0.12 0.06 0.10 1.80 
Diluted earnings per average common share1
1.21 0.61 0.64 2.20 
1The sum of the quarters may not equal annual EPS due to changes in the number of shares outstanding.
In Millions, Except Per Share Amounts
2020
Three Months EndedMarch 31June 30September 30December 31
CMS Energy, including Consumers
Operating revenue$1,802 $1,382 $1,507 $1,727 
Operating income335 248 340 307 
Income From Continuing Operations229 129 198 138 
Income From Discontinued Operations, Net of Tax14 12 24 
Net income243 137 210 162 
Income (loss) attributable to noncontrolling interests— (8)
Net income available to common stockholders243 136 218 158 
Basic earnings per average common share
Income from continuing operations per average common share available to common stockholders1
0.81 0.45 0.72 0.47 
Income from discontinued operations per average common share available to common stockholders1
0.05 0.03 0.04 0.08 
Basic earnings per average common share1
0.86 0.48 0.76 0.55 
Diluted earnings per average common share
Income from continuing operations per average common share available to common stockholders1
0.80 0.45 0.72 0.47 
Income from discontinued operations per average common share available to common stockholders1
0.05 0.03 0.04 0.08 
Diluted earnings per average common share1
0.85 0.48 0.76 0.55 
1The sum of the quarters may not equal annual EPS due to changes in the number of shares outstanding.