v3.20.2

Restructuring and Other Charges - Restructuring Reserve (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) employee | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) employee claimants | Sep. 30, 2019 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 21 | $ 4 |  |  | $ 4
Cash payments |  |  |  | (18) |  |  |  | (15)
Restructuring charges |  |  |  | 29 |  |  |  | 32
Other |  |  |  | (10) |  |  |  | 0
Ending balance |  | $ 24 |  | 24 |  |  |  | 21
Restructuring and other charges |  | (3) | $ (64) | (61) | (104) |  |  |
Separation-related adjustments (A) |  | 8 |  | 324 |  |  |  |
Restructuring and other charges (E) |  | $ 3 | 64 | $ 61 | 104 |  |  |
Number of employees separated | employee |  | 30 |  | 440 |  |  |  |
Forecast |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Cash payments | $ (12) |  |  |  |  | $ (1) | $ (11) |
Hard Alloy Extrusions Plant in South Korea |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  |  | $ 25 |  |  |  |
Aluminum Rolling Mill in Brazil |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  |  | (59) |  | (59) |  |  |
Gain (Loss) on Disposition of Business |  |  |  | 25 |  |  |  |
Operating segments |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | $ 0 | (62) | (6) | (99) |  |  |
Rolled Products [Member] |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | (1) | (61) | (15) | (69) |  |  |
Building and Construction Systems [Member] |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | 0 | (2) | (6) | (31) |  |  |
Extrusions [Member] |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | (1) | (1) | (27) | (1) |  |  |
Corporate Segment |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | (3) | (2) | (67) | (5) |  |  |
Layoff costs |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 20 | 1 |  |  | 1
Cash payments |  |  |  | (16) |  |  |  | (12)
Restructuring charges |  |  |  | 26 |  |  |  | 30
Other |  |  |  | (9) |  |  |  | 1
Ending balance |  | 23 |  | 23 |  |  |  | 20
Restructuring and other charges |  | (1) |  | (18) |  |  |  |
Separation-related adjustments (A) |  |  |  | 2 |  |  |  |
Layoff costs | Building and Construction System and Extrustions [Member] |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  |  |  | $ (8) |  |  |  |
Number of employees separated | claimants |  |  |  | 140 |  |  |  |
Other costs |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 1 | 3 |  |  | 3
Cash payments |  |  |  | (2) |  |  |  | (3)
Restructuring charges |  |  |  | 3 |  |  |  | 2
Other |  |  |  | (1) |  |  |  | (1)
Ending balance |  | 1 |  | 1 |  |  |  | $ 1
Restructuring and other charges |  | (1) |  | (7) | (2) |  |  |
Separation-related adjustments (A) |  |  |  | 0 |  |  |  |
Other costs | Building and Construction System and Extrustions [Member] |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  |  |  | (11) |  |  |  |
Spin-off |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |
Restructuring and other charges |  | $ 0 | $ (2) | (2) | $ (5) |  |  |
Separation-related adjustments (A) |  |  |  | $ 2 |  |  |  |

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