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Earnings Per Share - CMS Energy (Tables) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share - CMS Energy [Abstract] |
Basic And Diluted EPS Computations |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions, Except Per Share Amounts
﻿Three Months Ended March 31 | 2018 | 2017 |
﻿Income available to common stockholders |  |  |  |  |  |  |
﻿Net income available to common stockholders – basic and diluted |  | $ | 241 |  | $ | 199 |
﻿Average common shares outstanding |  |  |  |  |  |  |
﻿Weighted-average shares – basic |  |  | 281.5 |  |  | 278.9 |
﻿Add dilutive nonvested stock awards |  |  | 0.7 |  |  | 1.0 |
﻿Weighted-average shares – diluted |  |  | 282.2 |  |  | 279.9 |
﻿Net income per average common share available to common stockholders |  |  |  |  |  |  |
﻿Basic |  | $ | 0.86 |  | $ | 0.71 |
﻿Diluted |  |  | 0.86 |  |  | 0.71 |
﻿

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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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