v3.22.0.1

Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Schedule of Weighed-Average Useful Lives of Properties, Plants, and Equipment | The following table details the weighted-average useful lives of structures and machinery and equipment by reporting segment (numbers in years):
| Structures |  | Machinery and equipment
Rolled Products | 33 |  | 22
Building and Construction Systems | 25 |  | 18
Extrusions | 32 |  | 20
December 31, |  | 2021 |  | 2020
Land and land rights |  | $ | 22 |  |  | $ | 23 |
Structures: |  |  |  |
Rolled Products |  | 1,107 |  |  | 1,095 |
Building and Construction Systems |  | 96 |  |  | 95 |
Extrusions |  | 150 |  |  | 150 |
Other |  | 152 |  |  | 153 |
|  | 1,505 |  |  | 1,493 |
Machinery and equipment: |  |  |  |
Rolled Products |  | 4,816 |  |  | 4,787 |
Building and Construction Systems |  | 203 |  |  | 205 |
Extrusions |  | 523 |  |  | 520 |
Other |  | 291 |  |  | 279 |
|  | 5,833 |  |  | 5,791 |
|  | 7,360 |  |  | 7,307 |
Less: accumulated depreciation and amortization |  | 4,878 |  |  | 4,697 |
|  | 2,482 |  |  | 2,610 |
Construction work-in-progress |  | 169 |  |  | 102 |
|  | $ | 2,651 |  |  | $ | 2,712 |
Schedule of Weighted-Average Useful Lives of Software and Other Intangible Assets by Reportable Segment | The following table details the weighted-average useful lives of software and other intangible assets by reporting segment (numbers in years):
| Software |  | Other intangible assets
Rolled Products | 7 |  | 15
Building and Construction Systems | 4 |  | 20
Extrusions | 4 |  | 10
Other intangible assets, which are included in Other noncurrent assets on the accompanying Consolidated Balance Sheet, were as follows:
December 31, 2021 |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Computer software |  | $ | 555 |  |  | $ | (523) |  |  | $ | 32 |
Patents and licenses |  | 27 |  |  | (27) |  |  | — |
Other |  | 21 |  |  | (15) |  |  | 6 |
Total other intangible assets |  | $ | 603 |  |  | $ | (565) |  |  | $ | 38 |
December 31, 2020 |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Computer software |  | $ | 550 |  |  | $ | (510) |  |  | $ | 40 |
Patents and licenses |  | 28 |  |  | (28) |  |  | — |
Other |  | 21 |  |  | (14) |  |  | 7 |
Total other intangible assets |  | $ | 599 |  |  | $ | (552) |  |  | $ | 47 |

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