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Segment Information - Schedule of Operating Results of Arconic's Reportable Segments (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Total sales | $ 3,445 | $ 3,192 |
Segment operating profit | 400 | 451 |
Restructuring and other charges | 0 | 66 |
Provision for depreciation and amortization | 135 | 126 |
Assets | 18,219 |  | $ 18,718
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 3,486 | 3,225 |
Assets | 15,862 |  | 15,321
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Intersegment sales | 42 | 34 |
Third-Party Sales | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Third-party sales | 3,444 | 3,191 |
Engineered Products and Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment operating profit | 221 | 247 |
Restructuring and other charges | 1 | 6 |
Provision for depreciation and amortization | 71 | 64 |
Assets | 10,561 |  | 10,325
Engineered Products and Solutions | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 1,541 | 1,487 |
Engineered Products and Solutions | Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Intersegment sales | 0 | 0 |
Engineered Products and Solutions | Third-Party Sales | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Third-party sales | 1,541 | 1,487 |
Global Rolled Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment operating profit | 112 | 136 |
Restructuring and other charges | (1) | 57 |
Provision for depreciation and amortization | 51 | 50 |
Assets | 4,193 |  | 3,955
Global Rolled Products | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 1,408 | 1,282 |
Global Rolled Products | Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Intersegment sales | 42 | 34 |
Global Rolled Products | Third-Party Sales | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Third-party sales | 1,366 | 1,248 |
Transportation and Construction Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment operating profit | 67 | 68 |
Restructuring and other charges | 0 | 3 |
Provision for depreciation and amortization | 13 | 12 |
Assets | 1,108 |  | $ 1,041
Transportation and Construction Solutions | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total sales | 537 | 456 |
Transportation and Construction Solutions | Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Intersegment sales | 0 | 0 |
Transportation and Construction Solutions | Third-Party Sales | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Third-party sales | $ 537 | $ 456 |

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