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General and Summary of Significant Accounting Policies Change in Accounting Estimate (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts receivable, net of allowance for doubtful accounts of $5 and $13, respectively | $ 1,479 | $ 1,418 | $ 1,300 | $ 1,479
Other Assets, Current | (800) | (897) | (726) | (802)
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent | (1,319) |  |  | (1,351)
Other Assets, Noncurrent | (1,605) | (2,188) | (1,660) | (1,635)
Retained Earnings (Accumulated Deficit) | (731) | (1,089) | (680) | (692)
Stockholders' Equity Attributable to Noncontrolling Interest | 2,217 | 1,769 | 2,086 | 2,233
Loans and Leases Receivable, Allowance | 32 |  |  |
Accounts Receivable, Allowance for Credit Loss, Current | 20 | 5 | 13 |
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  | 16 | 12 |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | (11) | (9) |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | 0 | 0 |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  | (4) | (9) |
Accounts and Financing Receivable, Allowance for Credit Loss |  | 63 | 62 | 68
Other Current Assets [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Deferred Income Tax Assets, Net | $ 165 |  |  | 156
Accounts Receivable |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  | 9 | 9 | 4
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  | 9 | 11 |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | (11) | (9) |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | (2) | (3) |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  | 0 | 0 |
Mong Duong Subsidiary [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  | 30 | 32 | 34
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  | 0 | 0 |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | 0 | 0 |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | (2) | (2) |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  | 0 | 0 |
Other Entity [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  | 1 | 1 | 1
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  | 0 | 0 |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | 0 | 0 |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | 0 | 0 |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  | 0 | 0 |
AES Argentina [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  | 23 | 20 | $ 29
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) |  | 7 | 1 |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | 0 | 0 |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | 0 | (1) |
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation |  | $ (4) | $ (9) |
Accounting Standards Update 2016-13 [Member] | Mong Duong Subsidiary [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Financing Receivable, Credit Loss Rate | 2.40% |  |  |
Accounts and Financing Receivable, Allowance for Credit Loss | $ 34 |  |  |
Accounting Standards Update 2016-13 [Member] | AES Argentina [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Financing Receivable, Credit Loss Rate | 41.20% |  |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Accounts receivable, net of allowance for doubtful accounts of $5 and $13, respectively | $ 0 |  |  |
Other Assets, Current | (2) |  |  |
Deferred Income Tax Assets, Net | 9 |  |  |
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent | (32) |  |  |
Other Assets, Noncurrent | (30) |  |  |
Retained Earnings (Accumulated Deficit) | (39) |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ (16) |  |  |

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