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Segment Information - Schedule of Operating Results of Arconic's Reportable Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Total sales | $ 3,524 | $ 3,236 | $ 10,542 | $ 9,689
Segment operating profit | 389 | 377 | 1,221 | 1,282
Restructuring and other charges | 17 | 14 | 27 | 111
Provision for depreciation and amortization | 133 | 133 | 403 | 388
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 3,556 | 3,270 | 10,697 | 9,792
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 34 | 36 | 122 | 107
Third-Party Sales | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 3,522 | 3,234 | 10,575 | 9,685
Engineered Products and Solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment operating profit | 238 | 239 | 671 | 736
Restructuring and other charges | 15 | 10 | 25 | 24
Provision for depreciation and amortization | 71 | 68 | 212 | 198
Engineered Products and Solutions | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 1,566 | 1,477 | 4,703 | 4,449
Engineered Products and Solutions | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 0 | 0 | 0 | 0
Engineered Products and Solutions | Third-Party Sales | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 1,566 | 1,477 | 4,703 | 4,449
Global Rolled Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment operating profit | 74 | 64 | 309 | 333
Restructuring and other charges | 2 | 2 | 2 | 76
Provision for depreciation and amortization | 50 | 52 | 154 | 153
Global Rolled Products | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 1,460 | 1,270 | 4,365 | 3,860
Global Rolled Products | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 34 | 36 | 122 | 107
Global Rolled Products | Third-Party Sales | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 1,426 | 1,234 | 4,243 | 3,753
Transportation and Construction Solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment operating profit | 77 | 74 | 241 | 213
Restructuring and other charges | 0 | 2 | 0 | 11
Provision for depreciation and amortization | 12 | 13 | 37 | 37
Transportation and Construction Solutions | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 530 | 523 | 1,629 | 1,483
Transportation and Construction Solutions | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 0 | 0 | 0 | 0
Transportation and Construction Solutions | Third-Party Sales | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | $ 530 | $ 523 | $ 1,629 | $ 1,483

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