Restructuring and Other Charges - Restructuring and Other Charges by Segment (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2022 |
Jun. 30, 2021 |
Jun. 30, 2022 |
Jun. 30, 2021 |
|
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | $ 2 | $ 597 | $ 7 | $ 598 |
| Operating segments | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | 1 | 2 | 2 | 3 |
| Operating segments | Rolled Products | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | 0 | 0 | 0 | 1 |
| Operating segments | Building and Construction Systems | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | 0 | 0 | 0 | (1) |
| Operating segments | Extrusions | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | 1 | (2) | 2 | (3) |
| Corporate, Non-Segment | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring and other charges (E) | $ 1 | $ 595 | $ 5 | $ 595 |