Earnings Per Share - CMS Energy (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share - CMS Energy [Abstract]

Basic and Diluted EPS Computation

In Millions, Except Per Share Amounts
	Three Months Ended				Six Months Ended
June 30	2012		2011		2012		2011
Income Available to Common Stockholders
Income from continuing operations	$	101	$	101	$	161	$	234
Less income attributable to noncontrolling interest		1		1		1		1
Income from Continuing Operations Available to Common Stockholders – Basic and Diluted	$	100	$	100	$	160	$	233
Average Common Shares Outstanding
Weighted average shares – basic		261.2		250.3		258.4		250.2
Add dilutive contingently convertible securities		5.9		11.3		8.3		11.0
Add dilutive non-vested stock awards and options		1.1		0.3		1.0		0.3
Weighted average shares – diluted		268.2		261.9		267.7		261.5
Income from Continuing Operations per Average Common Share Available to Common Stockholders
Basic	$	0.38	$	0.40	$	0.61	$	0.93
Diluted		0.37		0.38		0.59		0.89

Schedule of Potential Impacts on the Calculation of Diluted EPS using the If-Converted Method

In Millions
	Three Months Ended				Six Months Ended
June 30	2012		2011		2012		2011
Increase to numerator from assumed reduction in interest expense		$        -		$        -		$        -		$        1
Increase to denominator from assumed conversion of debentures into common shares		-		0.7		0.2		0.7