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Commitments (Long-Term Purchase Commitments) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Electricity Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | $ 2,592 | $ 3,104 | $ 2,665
Future Commitments 2016 | 2,623 |  |
Future Commitments 2017 | 2,444 |  |
Future Commitments 2018 | 2,634 |  |
Future Commitments 2019 | 2,799 |  |
Future Commitments 2020 | 2,918 |  |
Future Commitments Thereafter | 24,176 |  |
Future Commitments Total | 37,594 |  |
Fuel Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | 1,262 | 1,521 | 1,590
Future Commitments 2016 | 1,120 |  |
Future Commitments 2017 | 835 |  |
Future Commitments 2018 | 532 |  |
Future Commitments 2019 | 314 |  |
Future Commitments 2020 | 311 |  |
Future Commitments Thereafter | 2,141 |  |
Future Commitments Total | 5,253 |  |
Other Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | 2,121 | $ 1,386 | $ 1,743
Future Commitments 2016 | 1,332 |  |
Future Commitments 2017 | 1,047 |  |
Future Commitments 2018 | 1,081 |  |
Future Commitments 2019 | 873 |  |
Future Commitments 2020 | 655 |  |
Future Commitments Thereafter | 4,395 |  |
Future Commitments Total | $ 9,383 |  |

X
- Definition The total minimum amount the entity agreed to spend under the long-term purchase commitment + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitment
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The actual amount the entity purchased under the long-term purchase commitment + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentAmountActual
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due after the fifth year following the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentThereafter
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due in the Fifth year following the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentWithinFiveYears
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due in the fourth year following the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentWithinFourYears
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due within one year of the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentWithinOneYear
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due in the third year following the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentWithinThreeYears
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment, which payments are due in the second year following the balance sheet date + References No definition available. + Details
Name: | aes_LongTermPurchaseCommitmentWithinTwoYears
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=aes_ElectricityPurchaseContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=aes_FuelPurchaseContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Data Type: | na
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Period Type: |