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v3.19.3.a.u2

Properties, Plants, and Equipment, Net (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | $ 11,806,000,000 | $ 11,734,000,000 |  |
Less: accumulated depreciation and amortization |  |  | 7,074,000,000 | 6,769,000,000 |  |
Properties plants and equipment excluding construction work in progress |  |  | 4,732,000,000 | 4,965,000,000 |  |
Construction work-in-progress |  |  | 731,000,000 | 739,000,000 |  |
Properties, plants, and equipment, net |  |  | 5,463,000,000 | 5,704,000,000 |  | $ 24,000,000
Non-cash asset impairments |  |  | $ 570,000,000 | 13,000,000 | $ 58,000,000 |
Percentage of fair value in excess of carrying amount |  |  | 50.00% |  |  |
Land and land rights |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | $ 128,000,000 | 136,000,000 |  |
Structures |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 2,385,000,000 | 2,364,000,000 |  |
Machinery and equipment: |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 9,293,000,000 | 9,234,000,000 |  |
Arconic Engines |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Non-cash asset impairments | $ 428,000,000 |  |  |  |  |
Assets |  | $ 515,000,000 |  |  |  |
Percentage of fair value in excess of carrying amount |  | 13.00% |  |  |  |
Asset impairment charges |  | $ 0 |  |  |  |
Total segment sales | Structures | Engineered Products and Forgings |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 812,000,000 | 769,000,000 |  |
Total segment sales | Structures | Global Rolled Products |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 1,304,000,000 | 1,317,000,000 |  |
Total segment sales | Machinery and equipment: | Engineered Products and Forgings |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 3,514,000,000 | 3,433,000,000 |  |
Total segment sales | Machinery and equipment: | Global Rolled Products |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 5,401,000,000 | 5,356,000,000 |  |
Other |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, net |  |  | 326,000,000 | 334,000,000 |  |
Other | Structures |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | 269,000,000 | 278,000,000 |  |
Other | Machinery and equipment: |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Properties, plants, and equipment, gross |  |  | $ 378,000,000 | $ 445,000,000 |  |
Property, Plant and Equipment | Arconic Engines |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Non-cash asset impairments | 198,000,000 |  |  |  |  |
Indefinite-lived Intangible Assets |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Non-cash asset impairments | 197,000,000 |  |  |  |  |
Other Noncurrent Assets] | Arconic Engines |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Non-cash asset impairments | $ 33,000,000 |  |  |  |  |

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