Share-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2010 years integer	Dec. 31, 2009 years	Dec. 31, 2008 years
Share Based Compensation Disclosure Stock Options [Abstract]
Price at which the Company may issue stock options (as a percent of market value)	100.00%
Stock options available for issuance	20
Weighted average fair value of stock options issued	$ 5.08	$ 4.08	$ 7.65
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	38.00%	66.00%	37.00%
Expected annual dividend yield	0.00%	0.00%	0.00%
Expected option term (years)	6	6	6
Risk-free interest rate	2.86%	2.01%	3.04%
Stock Option [Member]
Share Based Compensation Disclosure Stock Options [Abstract]
Unrecognized compensation cost related to stock options	$ 5
Period over which unrecognized compensation cost related to stock options will be recognized	1.5
Forfeiture rate, officer employees	12.09%
Forfeiture rate, non-officer employees	18.60%
Expense to be recognized over the next three years for options granted during current year	3.7
Expense to be recognized per year over the next three years for options granted during current year	1.2
Stock Option Expense Table
Pre-tax compensation expense	9	10	12
Tax benefit	(2)	(3)	(3)
Stock options expense, net of tax	7	7	9
Total intrinsic value of options excercised	2	3	9
Total fair value of options vested	11	13	13
Cash received from the exercise of stock options	2	6	17
Windfall tax benefits realized from the exercised stock options	0	0	1
Stock Option Rollforward Table
Beginning balance, options	22,372,000
Exercised year to date, options	(338,000)
Forfeited and expired year to date, options	(2,380,000)
Granted year to date, options	828,000
Ending balance, options	20,482,000	22,372,000
Vested and expected to vest, options	20,150,000
Eligible for exercise, options	18,079,000
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Exercise Price
Beginning balance, weighted average exercise price	$ 17.59
Exercised year to date, weighted average exercise price	$ 6.09
Forfeited and expired year to date, weighted average exercise price	$ 30.89
Granted year to date, weighted average exercise price	$ 12.17
Ending balance, weighted average exercise price	$ 16.04	$ 17.59
Vested and expected to vest, weighted average exercise price	$ 16.10
Eligible for exercise, weighted average exercise price	$ 16.68
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term
Weighted average remaining term, total options outstanding	3.1
Weighted average remaining term, vested and expected to vest	2.6
Weighted average remaining term, eligible for exercise	2.4
Share Based Compensation Arrangement By Share Based Payment Award Options Average Intrinsic Value
Aggregate intrinsic value, total options outstanding	25
Aggregate intrinsic value, vested and expected to vest	24
Aggregate intrinsic value, eligible for exercise	20
Share Based Compensation Disclosure Restricted Stock Units [Abstract]
Unrecognized compensation cost related to restriced stock units	5
Period over which unrecognized compensation cost related to restricted stock units will be recognized	1.5
Share Based Compensation Disclosure Restricted Stock Units Components Of Stock Based Compensation [Abstract]
RSU expense before income tax	9	10	12
Tax benefit	(2)	(3)	(3)
RSU expense, net of tax	7	7	9
Restricted Stock Units Without Market Conditions [Member]
Share Based Compensation Disclosure Stock Options [Abstract]
Unrecognized compensation cost related to stock options	11
Period over which unrecognized compensation cost related to stock options will be recognized	1.8
Stock Option Expense Table
Pre-tax compensation expense	11	11	10
Tax benefit	(2)	(3)	(2)
Stock options expense, net of tax	9	8	8
Share Based Compensation Disclosure Restricted Stock Units [Abstract]
Grant date fair value per Restricted Stock Unit	$ 12.18	$ 6.71	$ 18.87
Total grant date fair value	$ 13,000,000
Unrecognized compensation cost related to restriced stock units	11
Period over which unrecognized compensation cost related to restricted stock units will be recognized	1.8
Share Based Compensation Disclosure Restricted Stock Units Components Of Stock Based Compensation [Abstract]
RSU expense before income tax	11	11	10
Tax benefit	(2)	(3)	(2)
RSU expense, net of tax	9	8	8
Total value of RSUs converted	5	7	0
Total fair value of RSUs vested	12	12	10
Share Based Compensation Disclosure Restricted Stock Units Rollforward Of Activity
Nonvested, beginning balance, RSUs	2,471,000
Vested year to date, RSUs	(929,000)	619,000	597,000
Forfeited and expired year to date, RSUs	(455,000)
Granted year to date, RSUs	1,080,000
Nonvested, ending balance, RSUs	2,167,000	2,471,000
Vested at end of period, RSUs	2,226,000
Vested and expected to vest at end of period, RSUs	3,999,000
Share Based Compensation Disclosure Restricted Stock Units Weighted Average Grant Date Fair Value And Remaining Vesting Term
Nonvested, beginning balance, weighted average grade-date fair values	$ 10.73
Vested year to date, weighted average grant-date fair values	$ 12.56
Forfeited and expired year to date, weighted average grant-date fair values	$ 12.20
Granted year to date, weighted average grant-date fair values	$ 12.18	$ 6.71	$ 18.87
Nonvested, ending balance, weighted average grant-date fair values	$ 10.20	$ 10.73
Vested at end of period, weighted average grant-date fair values	$ 16.48
Vested and expected to vest at end of period, weighted average grant-date fair values	$ 13.67
Nonvested, ending balance, weighted average remaining vesting term	1.5
Share Based Compensation Disclosure Restricted Stock Units Vesting And Conversion Activity [Abstract]
RSUs vested during the year	(929,000)	619,000	597,000
RSUs converted during the year	386,000	772,000	59,000
Shares withheld for taxes from RSUs converted during the year	127,000	238,000	0
Restricted Stock Units With Market Conditions [Member]
Share Based Compensation Disclosure Stock Options [Abstract]
Unrecognized compensation cost related to stock options	5
Period over which unrecognized compensation cost related to stock options will be recognized	1.7
Stock Option Expense Table
Pre-tax compensation expense	4	4	4
Tax benefit	(1)	(1)	(1)
Stock options expense, net of tax	3	3	3
Share Based Compensation Disclosure Restricted Stock Units [Abstract]
Grant date fair value per Restricted Stock Unit	$ 11.57	$ 6.68	$ 16.23
Total grant date fair value	$ 4,000,000
Discount applied to the closing price of the Company's stock on the grant date to estimate the fair value to reflect the market condition applied	5.00%
Unrecognized compensation cost related to restriced stock units	5
Period over which unrecognized compensation cost related to restricted stock units will be recognized	1.7
Share Based Compensation Disclosure Restricted Stock Units Components Of Stock Based Compensation [Abstract]
RSU expense before income tax	4	4	4
Tax benefit	(1)	(1)	(1)
RSU expense, net of tax	3	3	3
Total value of RSUs converted	3	4	0
Total fair value of RSUs vested	$ 0	$ 0	$ 5
Share Based Compensation Disclosure Restricted Stock Units Rollforward Of Activity
Nonvested, beginning balance, RSUs	1,136,000
Vested year to date, RSUs	0	0	352,000
Forfeited and expired year to date, RSUs	(223,000)
Granted year to date, RSUs	370,000
Nonvested, ending balance, RSUs	1,283,000	1,136,000
Vested at end of period, RSUs	0
Vested and expected to vest at end of period, RSUs	1,125,000
Share Based Compensation Disclosure Restricted Stock Units Weighted Average Grant Date Fair Value And Remaining Vesting Term
Nonvested, beginning balance, weighted average grade-date fair values	$ 10.80
Vested year to date, weighted average grant-date fair values	$ 0
Forfeited and expired year to date, weighted average grant-date fair values	$ 17.78
Granted year to date, weighted average grant-date fair values	$ 11.57	$ 6.68	$ 16.23
Nonvested, ending balance, weighted average grant-date fair values	$ 9.80	$ 10.80
Vested at end of period, weighted average grant-date fair values	$ 0
Vested and expected to vest at end of period, weighted average grant-date fair values	$ 9.76
Nonvested, ending balance, weighted average remaining vesting term	1.3
Share Based Compensation Disclosure Restricted Stock Units Vesting And Conversion Activity [Abstract]
RSUs vested during the year	0	0	352,000
RSUs converted during the year	245,000	410,000	0
Shares withheld for taxes from RSUs converted during the year	102,000	153,000	0

The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qu

Name:	aes_AllocatedShareBasedCompensationExpenseNetOfTax
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate unrecognized cost of equity-based awards made to employees during the current period under equity-based compensation awards that have yet to vest.

+ Details

Name:	aes_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedRelatedToCurrentCurrentYearGrants
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The unrecognized cost of equity-based awards made to employees during the current period under equity-based compensation expected to vest each of the following three years.

+ Details

Name:	aes_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedRelatedToCurrentCurrentYearGrantsPerYear
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of shares (or other type of equity) coverted during the period, net of shares withheld for taxes.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConvertedInPeriod
Namespace Prefix:	aes
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares (or other type of equity) withheld during the period for taxes on shares converted.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConvertedInPeriodSharesWithheldForTaxes
Namespace Prefix:	aes
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The total fair value of equity-based awards for which the grantee converted during the reporting period in accordance with the terms of the arrangement.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConvertedInPeriodTotalFairValue
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodTotalGrantDateFairValue
Namespace Prefix:	aes
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingContractualTerm
Namespace Prefix:	aes
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) which have vested or are expected to vest at the balance sheet date.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestNumber
Namespace Prefix:	aes
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average fair value of awards vested and expected to vest on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan).

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue
Namespace Prefix:	aes
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumber
Namespace Prefix:	aes
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average fair value of vested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan).

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue
Namespace Prefix:	aes
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares available for issuance under the stock option plan (total shares authorized less shares previously granted).

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAuthorizedSharesAvailableForFutureIssuanance
Namespace Prefix:	aes
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAverageIntrinsicValue
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

+ Details

Name:	aes_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue2010
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ Details

Name:	aes_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2010
Namespace Prefix:	aes
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The aggregate fair value of options vested during the period.

+ Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedTotalFairValue
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePrice
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTerm
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureRestrictedStockUnitsAbstract
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureRestrictedStockUnitsComponentsOfStockBasedCompensationAbstract
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureRestrictedStockUnitsRollforwardOfActivity
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureRestrictedStockUnitsVestingAndConversionActivityAbstract
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureRestrictedStockUnitsWeightedAverageGrantDateFairValueAndRemainingVestingTerm
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	aes_ShareBasedCompensationDisclosureStockOptionsAbstract
Namespace Prefix:	aes
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Estimated rate of forfieture applied stock option expense for the Non-Officer population of stock option awards

+ Details

Name:	aes_ShareBasedCompensationEstimatedForfeitureRateNonOfficers
Namespace Prefix:	aes
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Estimated rate of forfieture applied stock option expense for the Officer population of stock option awards

+ Details

Name:	aes_ShareBasedCompensationEstimatedForfeitureRateOfficers
Namespace Prefix:	aes
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The authorized price of stock options that may be granted by the Company, as a percent of the grant date market price.

+ Details

Name:	aes_StockOptionGrantPriceAsPercentOfMarketPrice
Namespace Prefix:	aes
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	aes_WindfallTaxBenefitsRealizedFromExercisedStockOptions
Namespace Prefix:	aes
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the expense recognized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph g(1)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock options and conversion of similar instruments granted under share-based payment arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph i

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

As of the balance-sheet date, the aggregate unrecognized cost of share-based awards made to employees under share-based compensation plans that have yet to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for share-based compensation plans, using a decimal to express in number of years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The total recognized tax benefit related to compensation cost for share-based payment arrangements recognized in income during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph g(1)

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of shares under a share-based award plan other than a stock option plan that were settled during the reporting period due to a failure to satisfy vesting conditions pertaining to all option plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value as of the grant date of share-based award plans other than stock option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares issuable under a share-based award plan pertaining to grants made during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(b)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average fair value of nonvested awards on share-based plans excluding option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(b)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The total fair value of share-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(2)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The weighted average fair value as of grant dates pertaining to a share-based award plan other than a stock option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Restrictions on share-based instruments during the vesting period, such as the inability to transfer unvested awards, are not taken into account in estimating the fair value of the award. However, restrictions that remain in effect after an award is vested, such as the inability to transfer or hedge vested options or a prohibition on the sale of outstanding vested shares for a period of time, affect the estimate of an award's fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsDiscountForPostvestingRestrictions
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(c)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of time a share-based award is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated measure of the percentage amount by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(b)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph e(2)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance-sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(c), d(2)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(c)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average period between the balance-sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The decrease in the number of reserved shares that could potentially be issued attributable to the exercise or conversion during the reporting period of previously issued stock options under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(2)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

For presentations that combine terminations, the weighted average price of expired options and the price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period .

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The quantity of shares issuable on stock options awarded under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance-sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(b)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(a)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average period between the balance-sheet date and expiration date for fully vested and expected to vest options outstanding, which may be expressed in a decimal value for number of years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration