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Investments In and Advances To Affiliates - Summarized Financial Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 17,146 us-gaap_Revenues | $ 15,891 us-gaap_Revenues | $ 17,164 us-gaap_Revenues
Operating margin | 708 us-gaap_GrossProfit | 767 us-gaap_GrossProfit | 819 us-gaap_GrossProfit | 794 us-gaap_GrossProfit | 670 us-gaap_GrossProfit | 927 us-gaap_GrossProfit | 901 us-gaap_GrossProfit | 749 us-gaap_GrossProfit | 3,088 us-gaap_GrossProfit | 3,247 us-gaap_GrossProfit | 3,583 us-gaap_GrossProfit
Net income (loss) | 298 us-gaap_ProfitLoss | 508 us-gaap_ProfitLoss | 275 us-gaap_ProfitLoss | 66 us-gaap_ProfitLoss | (204)us-gaap_ProfitLoss | 223 us-gaap_ProfitLoss | 333 us-gaap_ProfitLoss | 199 us-gaap_ProfitLoss | 1,147 us-gaap_ProfitLoss | 551 us-gaap_ProfitLoss | (357)us-gaap_ProfitLoss
Assets, Current | 7,826 us-gaap_AssetsCurrent |  |  |  | 7,739 us-gaap_AssetsCurrent |  |  |  | 7,826 us-gaap_AssetsCurrent | 7,739 us-gaap_AssetsCurrent |
Liabilities, Current | 6,997 us-gaap_LiabilitiesCurrent |  |  |  | 7,653 us-gaap_LiabilitiesCurrent |  |  |  | 6,997 us-gaap_LiabilitiesCurrent | 7,653 us-gaap_LiabilitiesCurrent |
Liabilities, Noncurrent | 24,566 us-gaap_LiabilitiesNoncurrent |  |  |  | 25,029 us-gaap_LiabilitiesNoncurrent |  |  |  | 24,566 us-gaap_LiabilitiesNoncurrent | 25,029 us-gaap_LiabilitiesNoncurrent |
Stockholders' Equity Attributable to Noncontrolling Interest | 3,053 us-gaap_MinorityInterest |  |  |  | 3,321 us-gaap_MinorityInterest |  |  |  | 3,053 us-gaap_MinorityInterest | 3,321 us-gaap_MinorityInterest |
Stockholders' Equity Attributable to Parent | 4,272 us-gaap_StockholdersEquity |  |  |  | 4,330 us-gaap_StockholdersEquity |  |  |  | 4,272 us-gaap_StockholdersEquity | 4,330 us-gaap_StockholdersEquity |
Undistributed Earnings Of Minority Owned Affiliates Included In Retained Earnings | 159 aes_UndistributedEarningsOfMinorityOwnedAffiliatesIncludedInRetainedEarnings |  |  |  |  |  |  |  | 159 aes_UndistributedEarningsOfMinorityOwnedAffiliatesIncludedInRetainedEarnings |  |
Distributions Received From Minority Owned Affiliates |  |  |  |  |  |  |  |  | 28 aes_DistributionsReceivedFromMinorityOwnedAffiliates | 6 aes_DistributionsReceivedFromMinorityOwnedAffiliates | 22 aes_DistributionsReceivedFromMinorityOwnedAffiliates
Basis Difference Between Carrying Amount And Investment | 203 aes_BasisDifferenceBetweenCarryingAmountAndInvestment |  |  |  |  |  |  |  | 203 aes_BasisDifferenceBetweenCarryingAmountAndInvestment |  |
Minority Owned Affiliates |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 928 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 1,099 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 1,868 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember
Operating margin |  |  |  |  |  |  |  |  | 206 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 295 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 355 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember
Net income (loss) |  |  |  |  |  |  |  |  | 59 us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 53 us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 146 us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember
Assets, Current | 450 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 842 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 450 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 842 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Assets, Noncurrent | 1,748 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 3,722 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 1,748 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 3,722 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Liabilities, Current | 299 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 600 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 299 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 600 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Liabilities, Noncurrent | 935 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 2,096 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 935 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 2,096 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Stockholders' Equity Attributable to Noncontrolling Interest | 17 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 15 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 17 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 15 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Stockholders' Equity Attributable to Parent | 947 us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 1,853 us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |  |  |  | 947 us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember | 1,853 us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MinorityOwnedAffiliatesMember |
Majority Owned Affiliates |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 2 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 2 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 106 us-gaap_Revenues / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember
Operating margin |  |  |  |  |  |  |  |  | 0 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 0 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 26 us-gaap_GrossProfit / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember
Net income (loss) |  |  |  |  |  |  |  |  | 0 us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 0 us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | (5)us-gaap_ProfitLoss / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember
Assets, Current | 0 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 1 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 0 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 1 us-gaap_AssetsCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |
Assets, Noncurrent | 15 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 20 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 15 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 20 us-gaap_AssetsNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |
Liabilities, Current | 0 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 1 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 0 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 1 us-gaap_LiabilitiesCurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |
Liabilities, Noncurrent | 67 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 75 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 67 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 75 us-gaap_LiabilitiesNoncurrent / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |
Stockholders' Equity Attributable to Noncontrolling Interest | 0 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 0 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | 0 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | 0 us-gaap_MinorityInterest / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |
Stockholders' Equity Attributable to Parent | $ (52)us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | $ (55)us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |  |  |  | $ (52)us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember | $ (55)us-gaap_StockholdersEquity / us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis = aes_MajorityOwnedAffiliatesMember |

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