Earnings Per Share - CMS Energy (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share - CMS Energy

Basic and Diluted EPS Computation

In Millions, Except Per Share Amounts
	Three Months Ended				Six Months Ended
June 30	2011		2010		2011		2010
Income Available to Common Stockholders
Income from continuing operations	$	101	$	100	$	234	$	189
Less income attributable to noncontrolling interest		1		2		1		2
Less preferred stock dividends		—		2		—		5
Income from Continuing Operations Available to Common Stockholders — Basic and Diluted	$	100	$	96	$	233	$	182
Average Common Shares Outstanding
Weighted average shares — basic		250.3		228.2		250.2		228.1
Add dilutive contingently convertible securities		11.3		19.3		11.0		19.5
Add dilutive non-vested stock awards and options		0.3		0.1		0.3		0.1
Weighted average shares — diluted		261.9		247.6		261.5		247.7
Income from Continuing Operations per Average Common Share Available to Common Stockholders
Basic	$	0.40	$	0.42	$	0.93	$	0.80
Diluted		0.38		0.39		0.89		0.74

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	2011		2010		2011		2010
Increase to numerator from assumed reduction in interest expense	$	—	$	—	$	1	$	1
Increase to denominator from assumed conversion of debentures into common shares		0.7		0.7		0.7		0.7