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Segment and Geographic Area Information - Schedule of Segment Operating Profit to Consolidated Net Income (Loss) Income Attributable to Arconic (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |
Total segment operating profit |  | $ 2,015,000,000 | $ 1,586,000,000 | $ 1,689,000,000
Impairment of goodwill |  | 0 | 0 | 719,000,000
Restructuring and other charges |  | (620,000,000) | (9,000,000) | (165,000,000)
Operating income |  | 1,035,000,000 | 1,325,000,000 | 480,000,000
Interest expense | $ (24,000,000) | (338,000,000) | (378,000,000) | (496,000,000)
Other (expense) income, net |  | (122,000,000) | (79,000,000) | 486,000,000
Income before income taxes |  | 575,000,000 | 868,000,000 | 470,000,000
Segment Reconciling Item |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairment of goodwill |  | 0 | 0 | (719,000,000)
Restructuring and other charges |  | (620,000,000) | (9,000,000) | (165,000,000)
Corporate expense |  | (360,000,000) | (252,000,000) | (325,000,000)
Operating income |  | 1,035,000,000 | 1,325,000,000 | 480,000,000
Interest expense |  | (338,000,000) | (378,000,000) | (496,000,000)
Other (expense) income, net |  | (122,000,000) | (79,000,000) | 486,000,000
Income before income taxes |  | $ 575,000,000 | $ 868,000,000 | $ 470,000,000

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