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Financial Statement Presentation New Accounting Pronouncement Adopted (Details) - USD ($) |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  | $ 20,000,000 |  | $ 13,000,000 |  | $ 20,000,000 |  |  |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  |  |  | (9,000,000) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery |  |  |  | (2,000,000) |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Current |  | 1,479,000,000 |  | 1,404,000,000 |  | 1,479,000,000 |  |  |
Other current assets, net of allowance of $2 and $0, respectively |  | (800,000,000) | [1] | (747,000,000) |  | (802,000,000) | [1] |  |
Other Assets, Noncurrent |  | (1,605,000,000) | [2] | (1,537,000,000) |  | (1,635,000,000) | [2] |  |
Deferred Income Tax, Net |  | (165,000,000) |  | (336,000,000) |  | (156,000,000) |  |  |
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent |  | (1,319,000,000) |  | (1,260,000,000) |  | (1,351,000,000) |  |  |
Loan receivable, net of allowance of $32 and $0, respectively |  |  |  | 203,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  |  | 11,000,000 |  |  |  |  |
TOTAL ASSETS |  |  |  | 34,267,000,000 |  | 33,648,000,000 |  |  |
Accrued and other liabilities |  |  |  | 1,197,000,000 |  | 987,000,000 |  |  |
Accumulated deficit |  | 731,000,000 |  | 998,000,000 |  | 692,000,000 |  |  |
Accumulated other comprehensive loss |  |  |  | (2,628,000,000) |  | (2,229,000,000) |  |  |
NONCONTROLLING INTERESTS |  | 2,217,000,000 |  | 2,069,000,000 |  | 2,233,000,000 |  |  |
TOTAL LIABILITIES AND EQUITY |  |  |  | 34,267,000,000 |  | 33,648,000,000 |  |  |
Cash and Cash Equivalents, at Carrying Value |  |  |  | 1,505,000,000 |  | 1,029,000,000 |  |  |
Restricted Cash and Cash Equivalents, Current |  |  |  | 374,000,000 |  | 336,000,000 |  |  |
Debt service reserves and other deposits |  |  |  | 502,000,000 |  | 207,000,000 |  |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |  |  | 2,381,000,000 |  | 1,572,000,000 |  | $ 1,841,000,000 | $ 2,003,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  |  |  | 509,000,000 |  | 580,000,000 |  |  |
Accounts and Financing Receivable, Allowance for Credit Loss |  | 68,000,000 |  | 65,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  |  |  | 10,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  |  |  | (6,000,000) |  |  |  |  |
Allowance for Doubtful Accounts, Premiums and Other Receivables |  | 16,000,000 |  | 4,000,000 |  |  |  |  |
Loans and Leases Receivable, Allowance |  | 32,000,000 |  | 31,000,000 |  | 0 |  |  |
Stockholders' Equity Attributable to Parent |  |  |  | 2,004,000,000 |  | 2,996,000,000 |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  | $ (4,000,000) |  |  |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accounts Receivable, before Allowance for Credit Loss, Current |  | 1,500,000,000 |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  | $ (39,000,000) |  |  |  |
Accounts Receivable [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current | [3] | 4,000,000 |  | 9,000,000 |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) | [3] |  |  | 9,000,000 |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Writeoff | [3] |  |  | (9,000,000) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | [3] |  |  | (5,000,000) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation | [3] |  |  | 0 |  |  |  |  |
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  | 4,000,000 |  |  |  |  |  |  |
Other Entity [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  |  |  | 0 |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  |  |  | 0 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery |  |  |  | 0 |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Noncurrent |  | 1,000,000 |  | 1,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  |  |  | 0 |  |  |  |  |
Mong Duong Subsidiary [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  |  | 33,000,000 |  |  |  |  |
Accounts and Financing Receivable, Allowance for Credit Loss |  |  |  | 33,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  |  |  | 0 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff |  |  |  | 0 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery |  |  |  | (1,000,000) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  |  |  | 0 |  |  |  |  |
Mong Duong Subsidiary [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Loan receivable, net of allowance of $32 and $0, respectively |  | 1,400,000,000 |  |  |  |  |  |  |
Accounts and Financing Receivable, Allowance for Credit Loss |  | $ 34,000,000 |  |  |  |  |  |  |
Financing Receivable, Credit Loss Rate |  | 2.40% |  |  |  |  |  |  |
AES Argentina [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery |  |  |  | (2,000,000) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  |  | 22,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  |  |  | 1,000,000 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff |  |  |  | 0 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  |  |  | (6,000,000) |  |  |  |  |
AES Argentina [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  | $ 29,000,000 |  |  |  |  |  |  |
Financing Receivable, Credit Loss Rate |  | 41.20% |  |  |  |  |  |  |
Gener Subsidiary [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accumulated other comprehensive loss |  |  |  | $ (115,000,000) |  |  |  |  |
Gener Subsidiary [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Loan receivable, net of allowance of $32 and $0, respectively |  |  |  |  |  | $ 33,000,000 |  |  |
Debt Securities [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |  | $ 326,000,000 |  |  |  |  |  |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Current |  | 0 |  |  |  |  |  |  |
Other current assets, net of allowance of $2 and $0, respectively | [1] | (2,000,000) |  |  |  |  |  |  |
Other Assets, Noncurrent | [2] | (30,000,000) |  |  |  |  |  |  |
Deferred Income Tax, Net |  | (9,000,000) |  |  |  |  |  |  |
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent |  | (32,000,000) |  |  |  |  |  |  |
Accumulated deficit |  | 39,000,000 |  |  |  |  |  |  |
NONCONTROLLING INTERESTS |  | $ (16,000,000) |  |  |  |  |  |  |
[1] | Other current assets include the short-term portion of the Mong Duong loan receivable.
[2] | Other noncurrent assets include Argentina financing receivables.
[3] | Excludes operating lease receivable allowances and contractual dispute allowances of $16 million and $4 million as of January 1, 2020 and September 30, 2020, respectively. Those reserves are not in scope under ASC 326.

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