XML 75 R53.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Share-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Share Based Compensation Tables [Abstract] |
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table Text Block |
|  |  | December 31,
|  |  | 2011 |  | 2010 |  | 2009
| Expected volatility |  | 31% |  | 38% |  | 66%
| Expected annual dividend yield |  | 0% |  | 0% |  | 0%
| Expected option term (years) |  | 6 |  | 6 |  | 6
| Risk-free interest rate |  | 2.65% |  | 2.86% |  | 2.01%
Schedule Of Share Based Compensation Summary Of Financial Statement Components Stock Options [Text Block] |
|  | December 31,
|  | 2011 |  | 2010 |  | 2009
|  | (in millions)
Pre-tax compensation expense |  | $ | 7 |  | $ | 9 |  | $ | 10
Tax benefit |  |  | (2) |  |  | (2) |  |  | (3)
Stock options expense, net of tax |  | $ | 5 |  | $ | 7 |  | $ | 7
Total intrinsic value of options exercised |  | $ | 8 |  | $ | 2 |  | $ | 3
Total fair value of options vested |  |  | 7 |  |  | 11 |  |  | 13
Cash received from the exercise of stock options |  |  | 4 |  |  | 2 |  |  | 6
Schedule Of Share Based Compensation Stock Options Activity Table Text Block |
|  |  |  |  |  | Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value
Outstanding at December 31, 2010 |  | 20,482 |  | $ | 16.04 |  |  |  |  |
Exercised |  | (958) |  |  | 4.21 |  |  |  |  |
Forfeited and expired |  | (11,197) |  |  | 17.72 |  |  |  |  |
Granted |  | 1,131 |  |  | 12.60 |  |  |  |  |
Outstanding at December 31, 2011 |  | 9,458 |  | $ | 13.82 |  | 4.8 |  | $ | 17
Vested and expected to vest at December 31, 2011 |  | 9,379 |  | $ | 13.84 |  | 4.7 |  | $ | 16
Eligible for exercise at December 31, 2011 |  | 7,385 |  | $ | 14.58 |  | 4.1 |  | $ | 14
Schedule Of Share Based Compensation Summary Of Financial Statement Components Restricted Stock Units Without Market Conditions [Text Block] |
|  |  | December 31,
|  |  | 2011 |  | 2010 |  | 2009
|  | (in millions)
| RSU expense before income tax |  | $ | 11 |  | $ | 11 |  | $ | 11
| Tax benefit |  |  | (3) |  |  | (2) |  |  | (3)
| RSU expense, net of tax |  | $ | 8 |  | $ | 9 |  | $ | 8
| Total value of RSUs converted(1) |  | $ | 5 |  | $ | 5 |  | $ | 7
| Total fair value of RSUs vested |  | $ | 10 |  | $ | 12 |  | $ | 12
Schedule Of Share Based Compensation Restricted Stock Units Without Market Conditions Activity Table [Text Block] |
|  |  |  |  | RSUs |  | Weighted Average Grant Date Fair Values |  | Weighted Average Remaining Vesting Term
Nonvested at December 31, 2010 |  | 2,167 |  | $ | 10.20 |  |
Vested |  | (982) |  |  | 10.91 |  |
Forfeited and expired |  | (395) |  |  | 12.16 |  |
Granted |  | 1,565 |  |  | 12.65 |  |
Nonvested at December 31, 2011 |  | 2,355 |  | $ | 11.40 |  | 1.6
Vested at December 31, 2011 |  | 2,620 |  | $ | 13.97 |  |
Vested and expected to vest at December 31, 2011 |  | 4,788 |  | $ | 12.77 |  |
Schedule Of Share Based Compensation Restricted Stock Units Without Market Condition Vested And Converted Table [Text Block] |
|  |  | December 31,
|  |  | 2011 |  | 2010 |  | 2009
| RSUs vested during the year |  |  | 982 |  |  | 929 |  |  | 619
| RSUs converted during the year(1) |  |  | 442 |  |  | 386 |  |  | 772
Schedule Of Share Based Compensation Summary Of Financial Statement Components Restricted Stock Units With Market Conditions [Text Block] |
|  |  | December 31,
|  |  | 2011 |  | 2010 |  | 2009
|  |  | (in millions)
| RSU expense before income tax |  | $ | 5 |  | $ | 4 |  | $ | 4
| Tax benefit |  |  | (1) |  |  | (1) |  |  | (1)
| RSU expense, net of tax |  | $ | 4 |  | $ | 3 |  | $ | 3
| Total value of RSUs converted(1) |  | $ | - |  | $ | 3 |  | $ | 4
| Total fair value of RSUs vested(2) |  | $ | - |  | $ | - |  | $ | -
Schedule Of Share Based Compensation Restricted Stock Units With Market Conditions Activity Table [Text Block] |
|  |  |  |  | RSUs |  | Weighted Average Grant Date Fair Values |  | Weighted Average Remaining Vesting Term
Nonvested at December 31, 2010 |  | 1,283 |  | $ | 9.80 |  |
Vested |  | - |  |  | - |  |
Forfeited and expired |  | (693) |  |  | 13.94 |  |
Granted |  | 767 |  |  | 15.28 |  |
Nonvested at December 31, 2011 |  | 1,357 |  | $ | 10.78 |  | 1.1
Vested at December 31, 2011 |  | - |  | $ | - |  |
Vested and expected to vest at December 31, 2011 |  | 1,268 |  | $ | 10.55 |  |
Schedule Of Share Based Compensation Restricted Stock Units With Market Condition Vested And Converted Table [Text Block] |
|  |  | December 31,
|  |  | 2011 |  | 2010 |  | 2009
| RSUs vested during the year |  |  | - |  |  | - |  |  | -
| RSUs converted during the year(1) |  |  | - |  |  | 245 |  |  | 410

X
- Definition For restricted stock units with market conditions, disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. Also includes disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationRestrictedStockUnitsWithMarketConditionsActivityTableTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of restricted stock units with market conditions vested and converted during the year + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationRestrictedStockUnitsWithMarketConditionVestedAndConvertedTableTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For restricted stock units without market conditions, disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. Also includes disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationRestrictedStockUnitsWithoutMarketConditionsActivityTableTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of restricted stock units without market conditions vested and converted during the year + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationRestrictedStockUnitsWithoutMarketConditionVestedAndConvertedTableTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of the required disclosures representing the effect of restricted stock units with market conditions within the financial statements including pre-tax RSU expense, tax expense (benefit), total value of RSUs converted and total value of RSUs vested + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationSummaryOfFinancialStatementComponentsRestrictedStockUnitsWithMarketConditionsTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of the required disclosures representing the effect of restricted stock units without market conditions within the financial statements including pre-tax RSU expense, tax expense (benefit), total value of RSUs converted and total value of RSUs vested + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationSummaryOfFinancialStatementComponentsRestrictedStockUnitsWithoutMarketConditionsTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of the required disclosures representing the effect of stock options within the financial statements including pre-tax compensation expense, tax expense (benefit), instrinsic value of stock options exercised, fair value of options vested and cash proceeds from stock options exercised + References No definition available. + Details
Name: | aes_ScheduleOfShareBasedCompensationSummaryOfFinancialStatementComponentsStockOptionsTextBlock
Namespace Prefix: | aes_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | aes_ShareBasedCompensationTablesAbstract
Namespace Prefix: | aes_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration