Earnings Per Share - CMS Energy (Tables)

3 Months Ended

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