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v3.21.1

Fair Value (Nonrecurring Measurements) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other Asset Impairment Charges | $ 473 | $ 6 |
AES Puerto Rico |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 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 |
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] | Fair Value [Member] | Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets Carrying Amount Disclosure Nonrecurring | 73 |  |
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 |  | 195 |
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease) |  |  | $ 115
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 |
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 |  | 0 |
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 |  | $ 152 |
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 |  |
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 |  |
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 |  |
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 |  |
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] | 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, 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, 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] | 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% |  |
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 | 3.30% |  |
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 | 3.30% |  |
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 | 286 |  |
Foreign Exchange | Maximum [Member] | Argentina, Pesos |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative, Forward Exchange Rate | 640 |  |
Foreign Exchange | Minimum [Member] | Argentina, Pesos |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative, Forward Exchange Rate | 93 |  |

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