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Share-Based Compensation (PSU Compensation Expense) (Details) (PSUs, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSU expense before income tax	$ 6us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	$ 4us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	$ 5us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember
Tax benefit	(2)us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	(1)us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	(1)us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember
Total expense, net of tax	4us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	3us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	4us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember
Total value of PSUs converted	4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember
Total fair value of PSUs vested	$ 1aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedTotalFairValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	$ 0aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedTotalFairValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember	$ 2aes_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedTotalFairValue / us-gaap_AwardTypeAxis = aes_PerformanceStockUnitsMember

X

- Definition

The aggregate fair value of options vested during the period.

+ References

No definition available.

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X

- Definition

Represents the expense 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 qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

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 qualifying for treatment as employees.

+ References

No definition available.

+ Details

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- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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