Restructuring and Other Charges - Restructuring and Other Charges by Segment (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | $ 5 | $ 1 |
| Operating segments | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | 1 | 1 |
| Operating segments | Rolled Products | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | 0 | 1 |
| Operating segments | Building and Construction Systems | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | 0 | (1) |
| Operating segments | Extrusions | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | 1 | (1) |
| Corporate, Non-Segment | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring and other charges (E) | $ 4 | $ 0 |