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Quarterly Financial And Common Stock Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Quarterly Financial Data [Abstract] |
Schedule of Quarterly Financial Information Table |
In Millions, Except Per Share Amounts
| 2021
Three Months Ended | March 31 | June 30 | September 30 | December 31
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,013 |  |  | $ | 1,558 |  |  | $ | 1,725 |  |  | $ | 2,033 |
Operating income |  | 430 |  |  | 252 |  |  | 260 |  |  | 204 |
Income From Continuing Operations |  | 308 |  |  | 153 |  |  | 153 |  |  | 114 |
Income From Discontinued Operations, Net of Tax |  | 34 |  |  | 18 |  |  | 30 |  |  | 520 |
Net income |  | 342 |  |  | 171 |  |  | 183 |  |  | 634 |
Loss attributable to noncontrolling interests |  | (7) |  |  | (5) |  |  | (6) |  |  | (5) |
Net Income Attributable to CMS Energy |  | 349 |  |  | 176 |  |  | 189 |  |  | 639 |
Preferred Stock Dividends |  | — |  |  | — |  |  | 3 |  |  | 2 |
Net income available to common stockholders |  | 349 |  |  | 176 |  |  | 186 |  |  | 637 |
Basic earnings per average common share |  |  |  |  |  |  |  |
Income from continuing operations per average common share available to common stockholders 1 |  | 1.09 |  |  | 0.55 |  |  | 0.54 |  |  | 0.40 |
Income from discontinued operations per average common share available to common stockholders 1 |  | 0.12 |  |  | 0.06 |  |  | 0.10 |  |  | 1.80 |
Basic earnings per average common share 1 |  | 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 stockholders 1 |  | 1.09 |  |  | 0.55 |  |  | 0.54 |  |  | 0.40 |
Income from discontinued operations per average common share available to common stockholders 1 |  | 0.12 |  |  | 0.06 |  |  | 0.10 |  |  | 1.80 |
Diluted earnings per average common share 1 |  | 1.21 |  |  | 0.61 |  |  | 0.64 |  |  | 2.20 |
1 The 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 Ended | March 31 | June 30 | September 30 | December 31
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Operating revenue |  | $ | 1,802 |  |  | $ | 1,382 |  |  | $ | 1,507 |  |  | $ | 1,727 |
Operating income |  | 335 |  |  | 248 |  |  | 340 |  |  | 307 |
Income From Continuing Operations |  | 229 |  |  | 129 |  |  | 198 |  |  | 138 |
Income From Discontinued Operations, Net of Tax |  | 14 |  |  | 8 |  |  | 12 |  |  | 24 |
Net income |  | 243 |  |  | 137 |  |  | 210 |  |  | 162 |
Income (loss) attributable to noncontrolling interests |  | — |  |  | 1 |  |  | (8) |  |  | 4 |
Net income available to common stockholders |  | 243 |  |  | 136 |  |  | 218 |  |  | 158 |
Basic earnings per average common share |  |  |  |  |  |  |  |
Income from continuing operations per average common share available to common stockholders 1 |  | 0.81 |  |  | 0.45 |  |  | 0.72 |  |  | 0.47 |
Income from discontinued operations per average common share available to common stockholders 1 |  | 0.05 |  |  | 0.03 |  |  | 0.04 |  |  | 0.08 |
Basic earnings per average common share 1 |  | 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 stockholders 1 |  | 0.80 |  |  | 0.45 |  |  | 0.72 |  |  | 0.47 |
Income from discontinued operations per average common share available to common stockholders 1 |  | 0.05 |  |  | 0.03 |  |  | 0.04 |  |  | 0.08 |
Diluted earnings per average common share 1 |  | 0.85 |  |  | 0.48 |  |  | 0.76 |  |  | 0.55 |
1 The sum of the quarters may not equal annual EPS due to changes in the number of shares outstanding.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124502072&loc=d3e1280-108306 + Details
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