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Arconic Inc. Separation Transaction and Discontinued Operations - Summary of Results of Discontinued Operations (Details) - Discontinued Operations, Disposed of by Means Other than Sale - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Restructuring Cost and Reserve [Line Items] |  |  |  |
Sales | $ 0 | $ 1,874 | $ 1,576 | $ 3,662
Cost of goods sold | 0 | 1,603 | 1,292 | 3,129
Selling, general administrative, research and development and other expenses | 4 | 85 | 106 | 160
Provision for depreciation and amortization | 0 | 61 | 59 | 122
Restructuring and other charges | 0 | 27 | (18) | (5)
Interest expense | 0 | 0 | 7 | 0
Other expense, net | 0 | 24 | 42 | 43
Income (loss) from discontinued operations | (4) | 74 | 88 | 213
Provision for income taxes | 8 | 59 | 38 | 97
Income (loss) from discontinued operations after income taxes | $ (12) | $ 15 | $ 50 | $ 116

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