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Held-For-Sale Businesses and Dispositions Held-For-Sale Businesses and Dispositions (Tables) | 12 Months Ended
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Dec. 31, 2019
Held-For-Sale Businesses and Dispositions [Abstract] |
Disposal Groups, Including Discontinued Operations [Table Text Block] | Excluding any impairment charge or gain/loss on sale, pre-tax income (loss) attributable to AES of disposed businesses was as follows (in millions):
Year Ended December 31, | 2019 |  | 2018 |  | 2017
Kilroot and Ballylumford | $ | (1 | ) |  | $ | 35 |  |  | $ | 38 |
Stuart and Killen (1)(2) | 52 |  |  | 77 |  |  | 17 |
Shady Point | (5 | ) |  | 19 |  |  | 19 |
Masinloc | — |  |  | 9 |  |  | 103 |
Zimmer and Miami Fort | — |  |  | — |  |  | 26 |
Kazakhstan Hydroelectric | — |  |  | — |  |  | 33 |
Other | — |  |  | 21 |  |  | 39 |
Total | $ | 46 |  |  | $ | 161 |  |  | $ | 275 |
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(1) | After the retirement of Stuart and Killen in 2018, the Company entered into contracts to buy back all open capacity years for the plants at prices lower than the PJM capacity revenue prices. As such, the Company continued to earn capacity margin until the plants were transferred in December 2019.
(2) Reductions in the asset retirement obligations for ash ponds and landfills at Stuart and Killen in 2018 resulted in a $32 million reduction to cost of sales. See Note 4—Asset Retirement Obligations for further information.

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