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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill gross, beginning balance |  | $ 5,307,000,000 |  | $ 5,307,000,000 | $ 5,201,000,000 |
Accumulated impairment losses |  | (772,000,000) |  | (772,000,000) | (53,000,000) |
Goodwill, net |  | 4,535,000,000 |  | 4,535,000,000 | 5,148,000,000 |
Acquisitions and Divestitures |  |  |  | (1,000,000) |  |
Impairment |  | 0 |  | 0 | (719,000,000) | $ 0
Translation and other |  |  |  | (34,000,000) | 106,000,000 |
Goodwill gross, ending balance | $ 5,272,000,000 |  | $ 5,307,000,000 | 5,272,000,000 | 5,307,000,000 | 5,201,000,000
Accumulated impairment losses | (772,000,000) |  | (772,000,000) | (772,000,000) | (772,000,000) | (53,000,000)
Goodwill, ending balance | 4,500,000,000 | 4,535,000,000 | 4,535,000,000 | 4,535,000,000 | 5,148,000,000 | 5,148,000,000
Engineered Products and Solutions |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill, net |  | 4,205,000,000 |  | 4,205,000,000 |  |
Acquisitions and Divestitures |  |  |  | (1,000,000) |  |
Impairment |  |  | (719,000,000) |  | (719,000,000) |
Goodwill, ending balance | 4,179,000,000 | 4,205,000,000 | 4,205,000,000 | 4,205,000,000 |  |
Global Rolled Products |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill, net |  | 252,000,000 |  | 252,000,000 |  |
Acquisitions and Divestitures |  |  |  | 0 |  |
Impairment |  |  |  |  | 0 |
Goodwill, ending balance | 245,000,000 | 252,000,000 | 252,000,000 | 252,000,000 |  |
Transportation and Construction Solutions |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill, net |  | 78,000,000 |  | 78,000,000 |  |
Acquisitions and Divestitures |  |  |  | 0 |  |
Impairment |  |  |  |  | 0 |
Goodwill, ending balance | 76,000,000 | 78,000,000 | 78,000,000 | 78,000,000 |  |
Total segment sales | Engineered Products and Solutions |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill gross, beginning balance |  | 4,924,000,000 |  | 4,924,000,000 | 4,832,000,000 |
Accumulated impairment losses |  | (719,000,000) |  | (719,000,000) | 0 |
Goodwill, net |  | 4,205,000,000 |  | 4,205,000,000 | 4,832,000,000 |
Translation and other |  |  |  | (25,000,000) | 92,000,000 |
Goodwill gross, ending balance | 4,898,000,000 |  | 4,924,000,000 | 4,898,000,000 | 4,924,000,000 | 4,832,000,000
Accumulated impairment losses | (719,000,000) |  | (719,000,000) | (719,000,000) | (719,000,000) | 0
Goodwill, ending balance | 4,179,000,000 | 4,205,000,000 | 4,205,000,000 | 4,205,000,000 | 4,832,000,000 | 4,832,000,000
Total segment sales | Global Rolled Products |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill gross, beginning balance |  | 252,000,000 |  | 252,000,000 | 241,000,000 |
Accumulated impairment losses |  | 0 |  | 0 | 0 |
Goodwill, net |  | 252,000,000 |  | 252,000,000 | 241,000,000 |
Translation and other |  |  |  | (7,000,000) | 11,000,000 |
Goodwill gross, ending balance | 245,000,000 |  | 252,000,000 | 245,000,000 | 252,000,000 | 241,000,000
Accumulated impairment losses | 0 |  | 0 | 0 | 0 | 0
Goodwill, ending balance | 245,000,000 | 252,000,000 | 252,000,000 | 252,000,000 | 241,000,000 | 241,000,000
Total segment sales | Transportation and Construction Solutions |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |
Goodwill gross, beginning balance |  | 131,000,000 |  | 131,000,000 | 128,000,000 |
Accumulated impairment losses |  | (53,000,000) |  | (53,000,000) | (53,000,000) |
Goodwill, net |  | 78,000,000 |  | 78,000,000 | 75,000,000 |
Translation and other |  |  |  | (2,000,000) | 3,000,000 |
Goodwill gross, ending balance | 129,000,000 |  | 131,000,000 | 129,000,000 | 131,000,000 | 128,000,000
Accumulated impairment losses | (53,000,000) |  | (53,000,000) | (53,000,000) | (53,000,000) | (53,000,000)
Goodwill, ending balance | $ 76,000,000 | $ 78,000,000 | $ 78,000,000 | $ 78,000,000 | $ 75,000,000 | $ 75,000,000

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