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Acquisitions and Divestitures (Details) $ in Millions |  |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 01, 2019 USD ($) segment | Aug. 15, 2019 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 01, 2021 USD ($) | Jan. 31, 2020 USD ($) | May 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  | $ 15 | $ 5 | $ 442 |  |  |
Restructuring and other charges |  |  |  |  |  |  | 90 | 182 | 582 |  |  |
Restricted cash |  |  |  |  |  |  | $ 2 | 1 | 55 |  |  |
Small Additive Manufacturing Facility | Engineered Structures |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |  |  |  | $ 1
Proceeds from the sales of businesses |  | $ 13 |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  |  | 10 |  |  |
Gain (loss) on disposition of business |  |  |  |  |  |  |  |  | 13 |  |  |
Forgings Business | Engineered Structures |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration | $ 64 |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposition of business |  |  |  |  |  |  |  |  | 46 |  |  |
Restructuring and other charges |  |  |  |  |  |  |  | $ 5 |  |  |  |
Restricted cash |  |  |  |  |  |  |  |  | 53 |  |  |
Sales |  |  |  |  |  |  |  |  | $ 116 |  |  |
Number of employees | segment | 540 |  |  |  |  |  |  |  |  |  |  |
Disposed of by Sale | Small Manufacturing Facility In France | Fastening Systems |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |  | $ 10 |  |
Proceeds from the sales of businesses |  |  | $ 8 |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  | $ 4 |  |  |  |  |  |  |  |
Disposed of by Sale | Small Manufacturing Facility In The United Kingdom | Engineered Structures |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |  |  | $ 12 |
Asset impairment charges |  |  |  |  | $ 7 | $ 12 |  |  |  |  |  |

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