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Commitments (Long-Term Purchase Commitments) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Electricity Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | $ 827 | $ 747 | $ 420
Purchase Obligation, Due in Next Twelve Months | 786 |  |
Purchase Obligation, Due in Second Year | 602 |  |
Purchase Obligation, Due in Third Year | 371 |  |
Purchase Obligation, Due in Fourth Year | 234 |  |
Purchase Obligation, Due in Fifth Year | 393 |  |
Future Commitments Thereafter | 5,187 |  |
Future Commitments Total | 7,573 |  |
Fuel Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | 1,838 | 1,619 | 1,790
Purchase Obligation, Due in Next Twelve Months | 1,494 |  |
Purchase Obligation, Due in Second Year | 1,027 |  |
Purchase Obligation, Due in Third Year | 882 |  |
Purchase Obligation, Due in Fourth Year | 575 |  |
Purchase Obligation, Due in Fifth Year | 463 |  |
Future Commitments Thereafter | 1,734 |  |
Future Commitments Total | 6,175 |  |
Other Purchase Contracts |  |  |
Long-Term Purchase Commitment [Line Items] |  |  |
Purchases Under Long Term Contracts | 1,671 | $ 1,945 | $ 817
Purchase Obligation, Due in Next Twelve Months | 1,375 |  |
Purchase Obligation, Due in Second Year | 681 |  |
Purchase Obligation, Due in Third Year | 336 |  |
Purchase Obligation, Due in Fourth Year | 561 |  |
Purchase Obligation, Due in Fifth Year | 213 |  |
Future Commitments Thereafter | 778 |  |
Future Commitments Total | $ 3,944 |  |

X
- Definition The total minimum amount the entity agreed to spend under the long-term purchase commitment + References No definition available. + Details
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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
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- 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
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- 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
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X
- Definition Minimum amount of purchase arrangement maturing in the fifth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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X
- Definition Minimum amount of purchase arrangement maturing in the fourth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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X
- Definition Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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X
- Definition Minimum amount of purchase arrangement maturing in the third fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Details
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