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Consolidated Statements of Changes in Equity (USD $) In Millions, except Share data, unless otherwise specified | Total | Common Stock | Treasury Stock | Additional Paid-In Capital | Retained Earnings (Accumulated Deficit) | Accumulated Other Comprehensive Loss | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2011 |  | $ 8 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (489)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 8,507 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 678 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (2,758)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 3,783 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Beginning Balance (Shares) at Dec. 31, 2011 |  | 807,600,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 42,400,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (357)us-gaap_ProfitLoss |  |  |  | (912)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 555 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total change in fair value of available-for-sale securities, net of income tax |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Total foreign currency translation adjustment, net of income tax | (210)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  | (90)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (120)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total change in derivative fair value, including a reclassification to earnings, net of income tax | 43 us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax |  |  |  |  | 53 us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (10)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total pension adjustments, net of income tax | (564)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  |  |  | (125)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (439)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
OTHER COMPREHENSIVE INCOME (LOSS) | (731)us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  | (162)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (569)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Capital contributions from noncontrolling interests |  |  |  |  |  |  | 30 aes_CapitalContributionsFromNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interests |  |  |  |  |  |  | (802)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Disposition of businesses |  |  |  |  |  |  | (44)aes_NoncontrollingInterestDecreaseDueToDispositionOfBusinesses / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of treasury stock |  |  | (301)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Acquisition of treasury stock (shares) |  |  | 24,800,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Issuance and exercise of stock-based compensation benefit plans, net of income tax |  |  | 10 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 37 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares) |  | 3,100,000 aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (800,000)aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Dividends declared on common stock |  |  |  | (30)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (30)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Sale of subsidiary shares to noncontrolling interests |  |  |  | 7 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 5 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of subsidiary shares from noncontrolling interests |  |  |  | 4 us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (13)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance at Dec. 31, 2012 |  | 8 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (780)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 8,525 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (264)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (2,920)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 2,945 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance (Shares) at Dec. 31, 2012 |  | 810,700,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 66,400,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | 551 us-gaap_ProfitLoss |  |  |  | 114 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 437 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total foreign currency translation adjustment, net of income tax | (334)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  | (227)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (107)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total change in derivative fair value, including a reclassification to earnings, net of income tax | 247 us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax |  |  |  |  | 174 us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 73 us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total pension adjustments, net of income tax | 431 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  |  |  | 91 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 340 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
OTHER COMPREHENSIVE INCOME (LOSS) | 344 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  | 38 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 306 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Capital contributions from noncontrolling interests |  |  |  |  |  |  | 109 aes_CapitalContributionsFromNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interests |  |  |  |  |  |  | (553)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Disposition of businesses |  |  |  |  |  |  | (13)aes_NoncontrollingInterestDecreaseDueToDispositionOfBusinesses / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of treasury stock |  |  | (322)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Acquisition of treasury stock (shares) |  |  | 25,300,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Issuance and exercise of stock-based compensation benefit plans, net of income tax |  |  | 13 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 33 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares) |  | 2,600,000 aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (900,000)aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Dividends declared on common stock |  |  |  | (125)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Sale of subsidiary shares to noncontrolling interests | 16 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest |  |  | 16 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 91 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of subsidiary shares from noncontrolling interests | (6)us-gaap_MinorityInterestDecreaseFromRedemptions |  |  | (6)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (1)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance at Dec. 31, 2013 | 7,651 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 8 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (1,089)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 8,443 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (150)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (2,882)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 3,321 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance (Shares) at Dec. 31, 2013 |  | 813,300,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 90,800,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | 1,147 us-gaap_ProfitLoss |  |  |  | 769 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 378 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total foreign currency translation adjustment, net of income tax | (494)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  | (332)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (162)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total change in derivative fair value, including a reclassification to earnings, net of income tax | (259)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax |  |  |  |  | (108)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (151)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Total pension adjustments, net of income tax | (20)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  |  |  | (4)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (16)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
OTHER COMPREHENSIVE INCOME (LOSS) | (773)us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  | (444)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (329)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Balance sheet reclassification related to an equity method investment | 40 aes_Balancesheetreclassificationrelatedtoanequitymethodinvestment |  |  |  |  |  |
Capital contributions from noncontrolling interests |  |  |  |  |  |  | 147 aes_CapitalContributionsFromNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interests |  |  |  |  |  |  | (466)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Disposition of businesses |  |  |  |  |  |  | (153)aes_NoncontrollingInterestDecreaseDueToDispositionOfBusinesses / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of treasury stock |  |  | (308)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Acquisition of treasury stock (shares) | 21,900,246 us-gaap_TreasuryStockSharesAcquired |  | 21,900,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Issuance and exercise of stock-based compensation benefit plans, net of income tax |  |  | 26 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 3 aes_StockIssuedDuringPeriodValueBenefitPlansAndExerciseOfStockOptionsAndWarrantsNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares) |  | 1,200,000 aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (2,000,000)aes_StockIssuedDuringPeriodSharesBenefitPlansAndExerciseOfStockOptionsAndWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Dividends declared on common stock |  |  |  | (73)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (107)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Sale of subsidiary shares to noncontrolling interests | 29 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest |  |  | 29 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 173 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Acquisition of subsidiary shares from noncontrolling interests | 7 us-gaap_MinorityInterestDecreaseFromRedemptions |  |  | 7 us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (18)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance at Dec. 31, 2014 | $ 7,325 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 8 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (1,371)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 8,409 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 512 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (3,286)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 3,053 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ending Balance (Shares) at Dec. 31, 2014 |  | 814,500,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 110,700,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |

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