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Schedule I - Condensed Financial Information of Parent (Statement of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 54 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | $ 1,791 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ 2,715 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ 2,901 us-gaap_NetCashProvidedByUsedInOperatingActivities |
Investing Activities: |  |  |  |
Proceeds from asset sales, net of expenses | 38 us-gaap_ProceedsFromSaleOfProductiveAssets | 62 us-gaap_ProceedsFromSaleOfProductiveAssets | 46 us-gaap_ProceedsFromSaleOfProductiveAssets |
Decrease in restricted cash | 419 us-gaap_IncreaseDecreaseInRestrictedCash | 44 us-gaap_IncreaseDecreaseInRestrictedCash | (15)us-gaap_IncreaseDecreaseInRestrictedCash |
(Purchase) sale of short term investments, net | (728)us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates | (7)us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates | (20)us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates |
Net cash used in investing activities | (656)us-gaap_NetCashProvidedByUsedInInvestingActivities | (1,774)us-gaap_NetCashProvidedByUsedInInvestingActivities | (895)us-gaap_NetCashProvidedByUsedInInvestingActivities |
Financing Activities: |  |  |  |
Borrowings (payments) under the revolver, net | 836 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit | 1,139 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit | 2,788 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit |
Purchase of treasury stock | (308)us-gaap_PaymentsForRepurchaseOfCommonStock | (322)us-gaap_PaymentsForRepurchaseOfCommonStock | (301)us-gaap_PaymentsForRepurchaseOfCommonStock | (1,300)us-gaap_PaymentsForRepurchaseOfCommonStock
Common stock dividends paid | (144)us-gaap_PaymentsOfDividendsCommonStock | (119)us-gaap_PaymentsOfDividendsCommonStock | (30)us-gaap_PaymentsOfDividendsCommonStock |
Payments for deferred financing costs | (158)us-gaap_PaymentsOfFinancingCosts | (176)us-gaap_PaymentsOfFinancingCosts | (40)us-gaap_PaymentsOfFinancingCosts |
Net cash used in financing activities | (1,262)us-gaap_NetCashProvidedByUsedInFinancingActivities | (1,136)us-gaap_NetCashProvidedByUsedInFinancingActivities | (1,867)us-gaap_NetCashProvidedByUsedInFinancingActivities |
Effect of exchange rate changes on cash | (51)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (59)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | 5 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents |
Total (decrease) increase in cash and cash equivalents | (103)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (258)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 276 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease |
Cash and cash equivalents, beginning | 1,642 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,900 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,624 us-gaap_CashAndCashEquivalentsAtCarryingValue |
Cash and cash equivalents, ending | 1,539 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,642 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,900 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,539 us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURES: |  |  |  |
Cash payments for interest, net of amounts capitalized | 1,351 us-gaap_InterestPaidNet | 1,398 us-gaap_InterestPaidNet | 1,509 us-gaap_InterestPaidNet |
Cash payments for income taxes, net of refunds | 480 us-gaap_IncomeTaxesPaidNet | 570 us-gaap_IncomeTaxesPaidNet | 647 us-gaap_IncomeTaxesPaidNet |
Parent Company |  |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | 449 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 418 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 694 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Investing Activities: |  |  |  |
Proceeds from asset sales, net of expenses | (4)us-gaap_ProceedsFromSaleOfProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (5)us-gaap_ProceedsFromSaleOfProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_ProceedsFromSaleOfProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Investment in and net advances to subsidiaries | (69)aes_PaymentsForInvestmentsInAndAdvancesToSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 201 aes_PaymentsForInvestmentsInAndAdvancesToSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (168)aes_PaymentsForInvestmentsInAndAdvancesToSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Return of capital | 740 aes_ProceedsFromReturnOfCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 230 aes_ProceedsFromReturnOfCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 660 aes_ProceedsFromReturnOfCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Decrease in restricted cash | 96 us-gaap_IncreaseDecreaseInRestrictedCash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 50 us-gaap_IncreaseDecreaseInRestrictedCash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 44 us-gaap_IncreaseDecreaseInRestrictedCash / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Additions to property, plant and equipment | (31)us-gaap_PaymentsToAcquireProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (11)us-gaap_PaymentsToAcquireProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (24)us-gaap_PaymentsToAcquireProductiveAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
(Purchase) sale of short term investments, net | (1)us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1 us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1 us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Net cash used in investing activities | 731 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 466 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 513 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Financing Activities: |  |  |  |
Borrowings (payments) under the revolver, net | 0 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (295)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Borrowings of notes payable and other coupon bearing securities | 1,525 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 750 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Repayments of notes payable and other coupon bearing securities | (2,117)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,210)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (236)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Loans (to) from subsidiaries | 263 aes_ProceedsFromLoansFromSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (152)aes_ProceedsFromLoansFromSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (236)aes_ProceedsFromLoansFromSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Purchase of treasury stock | (308)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (322)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (301)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Proceeds from issuance of common stock | 1 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8 us-gaap_ProceedsFromIssuanceOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Common stock dividends paid | (144)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (119)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (30)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Payments for deferred financing costs | (20)us-gaap_PaymentsOfFinancingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (17)us-gaap_PaymentsOfFinancingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1)us-gaap_PaymentsOfFinancingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Net cash used in financing activities | (800)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,057)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,091)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Effect of exchange rate changes on cash | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Total (decrease) increase in cash and cash equivalents | 380 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (174)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 116 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Cash and cash equivalents, beginning | 131 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 305 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 189 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Cash and cash equivalents, ending | 511 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 131 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 305 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 511 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
SUPPLEMENTAL DISCLOSURES: |  |  |  |
Cash payments for interest, net of amounts capitalized | 373 us-gaap_InterestPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 442 us-gaap_InterestPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 479 us-gaap_InterestPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Cash payments for income taxes, net of refunds | $ (2)us-gaap_IncomeTaxesPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 11 us-gaap_IncomeTaxesPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0 us-gaap_IncomeTaxesPaidNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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