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Fair Value (Nonrecurring Measurements) (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges | $ 872 | $ 0 |  | $ 1,345 | $ 6
AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 73 |  |  | 73 |
Long Lived Assets Held And Used [Member] | OPGC [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges |  |  | $ 43 |  | 158
Long Lived Assets Held And Used [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges |  |  |  | 475 |
Long Lived Assets Held And Used [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges | 67 | 0 |  | 67 | 0
Long Lived Assets Held And Used [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges | 649 | 0 |  | 649 | 0
Long Lived Assets Held And Used [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other Asset Impairment Charges | 155 | 0 |  | 155 | 0
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 171 |  |  | 171 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | OPGC [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring |  | 272 | 195 |  | 272
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease) |  |  | 115 |  | 114
Long Lived Assets Held And Used [Member] | Fair Value [Member] | OPGC [Member] | Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring |  | 0 | 0 |  | 0
Long Lived Assets Held And Used [Member] | Fair Value [Member] | OPGC [Member] | Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring |  | 104 | 0 |  | 104
Long Lived Assets Held And Used [Member] | Fair Value [Member] | OPGC [Member] | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring |  | $ 0 | $ 152 |  | $ 0
Long Lived Assets Held And Used [Member] | Fair Value [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 548 |  |  | 548 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | AES Puerto Rico | Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | AES Puerto Rico | Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | AES Puerto Rico | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 73 |  |  | 73 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 78 |  |  | 78 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Mountain View Power Partners | Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Mountain View Power Partners | Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Mountain View Power Partners | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 11 |  |  | 11 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 661 |  |  | 661 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Ventanas [Domain] | Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Ventanas [Domain] | Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Ventanas [Domain] | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 12 |  |  | 12 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 241 |  |  | 241 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Angamos [Member] | Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Angamos [Member] | Level 2 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 0 |  |  | 0 |
Long Lived Assets Held And Used [Member] | Fair Value [Member] | Angamos [Member] | Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets Carrying Amount Disclosure Nonrecurring | $ 86 |  |  | $ 86 |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (0.02%) |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 2.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 8.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 8.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 54.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 23.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 58.00% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (80.00%) |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (69.00%) |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (18.00%) |
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (8.00%) |
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 18.20% |
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 7.50% |
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 11.00% |
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 11.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 45.99% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 6.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 11.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 97.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 56.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 21.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 53.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | AES Puerto Rico |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 37.00% |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Mountain View Power Partners |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (10.00%) |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Ventanas [Domain] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (5.00%) |
Measurement Input, Variable Margin | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum [Member] | Angamos [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | (8.00%) |
Interest Rate Contract [Member] | Measurement Input, Entity Credit Risk [Member] | Weighted Average [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 3.40% |
Interest Rate Contract [Member] | Measurement Input, Entity Credit Risk [Member] | Maximum [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 3.40% |
Interest Rate Contract [Member] | Measurement Input, Entity Credit Risk [Member] | Minimum [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 0.60% |
Cross currency derivatives [Member] | Measurement Input, Entity Credit Risk [Member] | Weighted Average [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 3.60% |
Cross currency derivatives [Member] | Measurement Input, Entity Credit Risk [Member] | Maximum [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 3.60% |
Cross currency derivatives [Member] | Measurement Input, Entity Credit Risk [Member] | Minimum [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Measurement Inputs, Nonrecurring |  |  |  | 3.60% |
Foreign Exchange | Weighted Average [Member] | Argentina, Pesos |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Derivative, Forward Exchange Rate | 256 |  |  | 256 |
Foreign Exchange | Maximum [Member] | Argentina, Pesos |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Derivative, Forward Exchange Rate | 551 |  |  | 551 |
Foreign Exchange | Minimum [Member] | Argentina, Pesos |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Derivative, Forward Exchange Rate | 97 |  |  | 97 |

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