XML 88 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Earnings Per Share - CMS Energy (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Earnings Per Share - CMS Energy [Abstract] |
Basic and Diluted EPS Computation |
Years Ended December 31 |  | 2011 |  |  | 2010 |  |  | 2009 |
Income Available to Common Stockholders |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 415 |  |  | $ | 366 |  |  | $ | 220 |
Less income attributable to noncontrolling interests |  |  | 2 |  |  |  | 3 |  |  |  | 11 |
Less charge for deferred issuance costs on preferred stock |  |  | - |  |  |  | 8 |  |  |  | - |
Less preferred stock dividends |  |  | - |  |  |  | 8 |  |  |  | 11 |
Income from Continuing Operations Available to Common Stockholders – Basic and Diluted |  | $ | 413 |  |  | $ | 347 |  |  | $ | 198 |
Average Common Shares Outstanding |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares – basic |  |  | 250.8 |  |  |  | 231.5 |  |  |  | 227.2 |
Add dilutive contingently convertible securities |  |  | 12.2 |  |  |  | 21.3 |  |  |  | 10.6 |
Add dilutive non-vested stock awards and options |  |  | 0.4 |  |  |  | 0.1 |  |  |  | 0.1 |
Weighted average shares – diluted |  |  | 263.4 |  |  |  | 252.9 |  |  |  | 237.9 |
Income from Continuing Operations per Average Common Share Available to Common Stockholders |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.65 |  |  | $ | 1.50 |  |  | $ | 0.87 |
Diluted |  |  | 1.57 |  |  |  | 1.36 |  |  |  | 0.83 |
Schedule of Potential Impacts on the Calculation of Diluted EPS using the If-Converted Method |
Years Ended December 31 |  | 2011 |  |  | 2010 |  |  | 2009 |
Increase to numerator from assumed reduction in interest expense |  | $ | 1 |  |  | $ | 1 |  |  | $ | 5 |
Increase to denominator from assumed conversion of debentures into common shares |  |  | 0.7 |  |  |  | 0.7 |  |  |  | 2.3 |

X
- Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration