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Quarterly Financial And Common Stock Information (Tables) | 12 Months Ended
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Dec. 31, 2015
Schedule of Quarterly Financial Information Table |
In Millions, Except Per Share Amounts and Stock Prices
| 2015
Quarters Ended | March 31 | June 30 | Sept 30 | Dec 31 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,111 |  | $ | 1,350 |  | $ | 1,486 |  | $ | 1,509 |
Operating income |  |  | 397 |  |  | 204 |  |  | 317 |  |  | 245 |
Net income |  |  | 202 |  |  | 68 |  |  | 148 |  |  | 107 |
Income attributable to noncontrolling interests |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholders |  |  | 202 |  |  | 67 |  |  | 148 |  |  | 106 |
Basic earnings per average common share 1 |  |  | 0.73 |  |  | 0.25 |  |  | 0.53 |  |  | 0.39 |
Diluted earnings per average common share 1 |  |  | 0.73 |  |  | 0.25 |  |  | 0.53 |  |  | 0.38 |
Common stock prices 2 |  |  |  |  |  |  |  |  |  |  |  |  |
High |  |  | 38.20 |  |  | 35.57 |  |  | 35.82 |  |  | 37.17 |
Low |  |  | 32.83 |  |  | 31.39 |  |  | 32.10 |  |  | 34.24 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,028 |  | $ | 1,281 |  | $ | 1,417 |  | $ | 1,439 |
Operating income |  |  | 379 |  |  | 192 |  |  | 305 |  |  | 246 |
Net income |  |  | 215 |  |  | 84 |  |  | 160 |  |  | 135 |
Preferred stock dividends |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholder |  |  | 215 |  |  | 83 |  |  | 160 |  |  | 134 |
In Millions, Except Per Share Amounts and Stock Prices
| 2014
Quarters Ended | March 31 | June 30 | Sept 30 | Dec 31 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,523 |  | $ | 1,468 |  | $ | 1,430 |  | $ | 1,758 |
Operating income |  |  | 408 |  |  | 235 |  |  | 236 |  |  | 273 |
Net income |  |  | 204 |  |  | 84 |  |  | 94 |  |  | 97 |
Income attributable to noncontrolling interests |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholders |  |  | 204 |  |  | 83 |  |  | 94 |  |  | 96 |
Basic earnings per average common share 1 |  |  | 0.77 |  |  | 0.31 |  |  | 0.34 |  |  | 0.35 |
Diluted earnings per average common share 1 |  |  | 0.75 |  |  | 0.30 |  |  | 0.34 |  |  | 0.35 |
Common stock prices 2 |  |  |  |  |  |  |  |  |  |  |  |  |
High |  |  | 29.28 |  |  | 31.15 |  |  | 30.87 |  |  | 36.42 |
Low |  |  | 26.12 |  |  | 28.87 |  |  | 28.18 |  |  | 29.78 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,382 |  | $ | 1,387 |  | $ | 1,359 |  | $ | 1,672 |
Operating income |  |  | 399 |  |  | 227 |  |  | 245 |  |  | 264 |
Net income |  |  | 221 |  |  | 109 |  |  | 119 |  |  | 118 |
Preferred stock dividends |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholder |  |  | 221 |  |  | 108 |  |  | 119 |  |  | 117 |
| 1 |  | The sum of the quarters may not equal annual EPS due to changes in the number of shares outstanding.
| 2 |  | Based on New York Stock Exchange composite transactions.
Consumers Energy Company [Member] |
Schedule of Quarterly Financial Information Table |
In Millions, Except Per Share Amounts and Stock Prices
| 2015
Quarters Ended | March 31 | June 30 | Sept 30 | Dec 31 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,111 |  | $ | 1,350 |  | $ | 1,486 |  | $ | 1,509 |
Operating income |  |  | 397 |  |  | 204 |  |  | 317 |  |  | 245 |
Net income |  |  | 202 |  |  | 68 |  |  | 148 |  |  | 107 |
Income attributable to noncontrolling interests |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholders |  |  | 202 |  |  | 67 |  |  | 148 |  |  | 106 |
Basic earnings per average common share 1 |  |  | 0.73 |  |  | 0.25 |  |  | 0.53 |  |  | 0.39 |
Diluted earnings per average common share 1 |  |  | 0.73 |  |  | 0.25 |  |  | 0.53 |  |  | 0.38 |
Common stock prices 2 |  |  |  |  |  |  |  |  |  |  |  |  |
High |  |  | 38.20 |  |  | 35.57 |  |  | 35.82 |  |  | 37.17 |
Low |  |  | 32.83 |  |  | 31.39 |  |  | 32.10 |  |  | 34.24 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,028 |  | $ | 1,281 |  | $ | 1,417 |  | $ | 1,439 |
Operating income |  |  | 379 |  |  | 192 |  |  | 305 |  |  | 246 |
Net income |  |  | 215 |  |  | 84 |  |  | 160 |  |  | 135 |
Preferred stock dividends |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholder |  |  | 215 |  |  | 83 |  |  | 160 |  |  | 134 |
In Millions, Except Per Share Amounts and Stock Prices
| 2014
Quarters Ended | March 31 | June 30 | Sept 30 | Dec 31 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,523 |  | $ | 1,468 |  | $ | 1,430 |  | $ | 1,758 |
Operating income |  |  | 408 |  |  | 235 |  |  | 236 |  |  | 273 |
Net income |  |  | 204 |  |  | 84 |  |  | 94 |  |  | 97 |
Income attributable to noncontrolling interests |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholders |  |  | 204 |  |  | 83 |  |  | 94 |  |  | 96 |
Basic earnings per average common share 1 |  |  | 0.77 |  |  | 0.31 |  |  | 0.34 |  |  | 0.35 |
Diluted earnings per average common share 1 |  |  | 0.75 |  |  | 0.30 |  |  | 0.34 |  |  | 0.35 |
Common stock prices 2 |  |  |  |  |  |  |  |  |  |  |  |  |
High |  |  | 29.28 |  |  | 31.15 |  |  | 30.87 |  |  | 36.42 |
Low |  |  | 26.12 |  |  | 28.87 |  |  | 28.18 |  |  | 29.78 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 2,382 |  | $ | 1,387 |  | $ | 1,359 |  | $ | 1,672 |
Operating income |  |  | 399 |  |  | 227 |  |  | 245 |  |  | 264 |
Net income |  |  | 221 |  |  | 109 |  |  | 119 |  |  | 118 |
Preferred stock dividends |  |  | - |  |  | 1 |  |  | - |  |  | 1 |
Net income available to common stockholder |  |  | 221 |  |  | 108 |  |  | 119 |  |  | 117 |
| 1 |  | The sum of the quarters may not equal annual EPS due to changes in the number of shares outstanding.
| 2 |  | Based on New York Stock Exchange composite transactions.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 + Details
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