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Discontinued Operations - Major Classes of Cash Flow Items (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |  |
Income (loss) from discontinued operations | [1] | $ 2 | $ (857) | $ (62) | $ 322
Depreciation and amortization, including regulatory assets, net, intangible assets and deferred debt-related costs |  |  |  | 1,069 | 1,003
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |  |
Property additions |  | (684) | (635) | (1,912) | (1,942)
Sales of investment securities held in trusts |  |  |  | 506 | 736
Purchases of investment securities held in trusts |  |  |  | (536) | (780)
FES and FENOC | Discontinued Operations, Disposed of by Means Other than Sale |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |  |
Income (loss) from discontinued operations |  | $ 2 | $ (857) | (62) | 322
Depreciation and amortization, including regulatory assets, net, intangible assets and deferred debt-related costs |  |  |  | 0 | 110
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |  |
Property additions |  |  |  | 0 | (27)
Sales of investment securities held in trusts |  |  |  | 0 | 109
Purchases of investment securities held in trusts |  |  |  | $ 0 | $ (122)
[1] | Net of income tax expense (benefits) of $2 million and $(342) million for the three months ended September 30, 2019 and 2018, respectively, and $46 million and $(1.2) billion for the nine months ended September 30, 2019 and 2018, respectively.

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