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v3.20.1

Acquisitions and Divestitures (Details) $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Mar. 01, 2020 USD ($) employee | Feb. 01, 2020 USD ($) employee | Dec. 01, 2019 USD ($) employee | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) | Jan. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Restricted cash |  |  |  | $ 52 |  | $ 55 |
Engineered Products and Forgings | Small manufacturing facility in the United Kingdom |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal group, consideration |  |  |  |  |  |  | $ 12
Asset impairment charges |  |  |  | 12 |  |  |
Engineered Products and Forgings | Forgings Business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal group, consideration |  |  | $ 64 |  |  |  |
Asset impairment charges |  |  |  | 6 |  |  |
Gain (loss) on sale of business |  |  | $ (46) |  |  |  |
Disposal group, including discontinued operation, revenue |  |  |  |  | $ 32 |  |
Number of employees | employee |  |  | 540 |  |  |  |
Restricted cash |  |  |  | 53 |  | 53 |
Global Rolled Products | Aluminum Rolling Mill |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal group, consideration |  | $ 50 |  |  |  |  |
Asset impairment charges |  |  |  | 6 |  | $ 53 |
Gain (loss) on sale of business |  |  |  | (59) |  |  |
Disposal group, including discontinued operation, revenue |  |  |  | 11 | 40 |  |
Number of employees | employee |  | 525 |  |  |  |  |
Global Rolled Products | Hard alloy extrusions plant in South Korea |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal group, consideration | $ 62 |  |  |  |  |  |
Gain (loss) on sale of business |  |  |  | 27 |  |  |
Disposal group, including discontinued operation, revenue |  |  |  | $ 8 | $ 13 |  |
Number of employees | employee | 158 |  |  |  |  |  |

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