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Earnings Per Share - CMS Energy (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share - CMS Energy [Abstract] |
Basic And Diluted EPS Computations |
In Millions, Except Per Share Amounts
Years Ended December 31 | 2015 | 2014 | 2013 |
Income available to common stockholders |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 525 |  | $ | 479 |  | $ | 454 |
Less income attributable to noncontrolling interests |  |  | 2 |  |  | 2 |  |  | 2 |
Net income available to common stockholders – basic and diluted |  | $ | 523 |  | $ | 477 |  | $ | 452 |
Average common shares outstanding |  |  |  |  |  |  |  |  |  |
Weighted-average shares – basic |  |  | 275.6 |  |  | 270.6 |  |  | 264.5 |
Add dilutive contingently convertible securities |  |  | - |  |  | 3.1 |  |  | 6.4 |
Add dilutive nonvested stock awards |  |  | 0.9 |  |  | 0.9 |  |  | 1.0 |
Weighted-average shares – diluted |  |  | 276.5 |  |  | 274.6 |  |  | 271.9 |
Net income per average common share available to common stockholders |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.90 |  | $ | 1.76 |  | $ | 1.71 |
Diluted |  |  | 1.89 |  |  | 1.74 |  |  | 1.66 |
Dividends declared per common share |  | $ | 1.16 |  | $ | 1.08 |  | $ | 1.02 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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