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Earnings Per Share - CMS Energy (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Basic And Diluted EPS Computations | Presented in the following table are CMS Energy’s basic and diluted EPS computations based on net income:
In Millions, Except Per Share Amounts |
| Three Months Ended |  | Nine Months Ended
September 30 | 2018 |  | 2017 |  |  | 2018 |  | 2017 |
Income available to common stockholders |  |  |  |  |  |  |  |  |
Net income |  | $ | 169 |  |  | $ | 172 |  |  |  | $ | 550 |  |  | $ | 464 |
Less income attributable to noncontrolling interests |  | — |  |  | — |  |  |  | 1 |  |  | 1 |
Net income available to common stockholders – basic and diluted |  | $ | 169 |  |  | $ | 172 |  |  |  | $ | 549 |  |  | $ | 463 |
Average common shares outstanding |  |  |  |  |  |  |  |  |
Weighted-average shares – basic |  | 282.5 |  |  | 280.8 |  |  |  | 282.1 |  |  | 279.8 |
Add dilutive nonvested stock awards |  | 0.7 |  |  | 0.8 |  |  |  | 0.7 |  |  | 0.8 |
Weighted-average shares – diluted |  | 283.2 |  |  | 281.6 |  |  |  | 282.8 |  |  | 280.6 |
Net income per average common share available to common stockholders |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.60 |  |  | $ | 0.61 |  |  |  | $ | 1.95 |  |  | $ | 1.65 |
Diluted |  | 0.59 |  |  | 0.61 |  |  |  | 1.94 |  |  | 1.65 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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