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Earnings Per Share - CMS Energy (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share - CMS Energy [Abstract]

Basic and Diluted EPS Computation

		In Millions, Except Per Share Amounts
Three Months Ended March 31		2012				2011
Income Available to Common Stockholders
Income from Continuing Operations Available to Common Stockholders – Basic and Diluted		$	60			$	133
Average Common Shares Outstanding
Weighted average shares – basic			255.6				250.0
Add dilutive contingently convertible securities			10.4				10.7
Add dilutive non-vested stock awards and options			0.8				0.3
Add dilutive convertible debentures			—				0.7
Weighted average shares – diluted			266.8				261.7
Income from Continuing Operations per Average Common Share Available to Common Stockholders
Basic		$	0.23			$	0.53
Diluted			0.22				0.51

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

		In Millions
Three Months Ended March 31		2012
Increase to numerator from assumed reduction in interest expense		$	1
Increase to denominator from assumed conversion of debentures into common shares			0.5

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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Tabular disclosure of an entity's basic and diluted earnings per share calculations.

+ References

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