v3.20.2

Revenue from Contracts with Customers (Tables) | 9 Months Ended
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Sep. 30, 2020
Revenue from Contract with Customer [Abstract] |
Schedule of Revenue by Major End Market Served | The following table disaggregates revenue by major end market served.
Third quarter ended September 30, |  | Rolled Products |  | Building and Construction Systems |  | Extrusions |  | Total
2020 |  | ​ |  | ​ |  | ​ |  | ​
Ground Transportation |  | $ | 493 |  |  | $ | — |  |  | $ | 25 |  |  | $ | 518 |
Building and Construction |  | 42 |  |  | 241 |  |  | — |  |  | 283 |
Aerospace |  | 107 |  |  | — |  |  | 44 |  |  | 151 |
Industrial Products and Other |  | 252 |  |  | — |  |  | 13 |  |  | 265 |
Packaging |  | 198 |  |  | — |  |  | — |  |  | 198 |
Total end-market revenue |  | $ | 1,092 |  |  | $ | 241 |  |  | $ | 82 |  |  | $ | 1,415 |
2019 |  | ​ |  | ​ |  | ​ |  | ​
Ground Transportation |  | $ | 592 |  |  | $ | — |  |  | $ | 26 |  |  | $ | 618 |
Building and Construction |  | 47 |  |  | 282 |  |  | — |  |  | 329 |
Aerospace |  | 243 |  |  | — |  |  | 68 |  |  | 311 |
Industrial Products and Other |  | 279 |  |  | — |  |  | 32 |  |  | 311 |
Packaging |  | 236 |  |  | — |  |  | — |  |  | 236 |
Total end-market revenue |  | $ | 1,397 |  |  | $ | 282 |  |  | $ | 126 |  |  | $ | 1,805 |
Nine months ended September 30, | ​ | Rolled Products |  | Building and Construction Systems |  | Extrusions |  | Total
2020 | ​ | ​ |  | ​ |  | ​ |  | ​
Ground Transportation | ​ | $ | 1,242 |  |  | $ | — |  |  | $ | 62 |  |  | $ | 1,304 |
Building and Construction | ​ | 110 |  |  | 727 |  |  | — |  |  | 837 |
Aerospace | ​ | 505 |  |  | — |  |  | 183 |  |  | 688 |
Industrial Products and Other | ​ | 766 |  |  | — |  |  | 51 |  |  | 817 |
Packaging | ​ | 571 |  |  | — |  |  | — |  |  | 571 |
Total end-market revenue | ​ | $ | 3,194 |  |  | $ | 727 |  |  | $ | 296 |  |  | $ | 4,217 |
2019 |  | ​ |  | ​ |  | ​ |  | ​
Ground Transportation |  | $ | 1,878 |  |  | $ | — |  |  | $ | 88 |  |  | $ | 1,966 |
Building and Construction |  | 149 |  |  | 855 |  |  | — |  |  | 1,004 |
Aerospace |  | 754 |  |  | — |  |  | 221 |  |  | 975 |
Industrial Products and Other |  | 826 |  |  | — |  |  | 111 |  |  | 937 |
Packaging |  | 687 |  |  | — |  |  | — |  |  | 687 |
Total end-market revenue |  | $ | 4,294 |  |  | $ | 855 |  |  | $ | 420 |  |  | $ | 5,569 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 + Details
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