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B5 Inventories (Tables) | 12 Months Ended
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Dec. 31, 2020
Classes Of Current Inventories Alternative [Abstract] |
Summary of Inventories |
Inventories |  |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |
Raw materials, components, consumables |  |  |  |  |  |  |  |
and manufacturing work in progress |  |  | 9,510 |  |  |  | 8,209 |
Finished products |  |  | 8,709 |  |  |  | 8,742 |
Contract work in progress |  |  | 9,878 |  |  |  | 13,912 |
Inventories, net |  |  | 28,097 |  |  |  | 30,863 |
Movements in Obsolescence Allowances |
Movements in obsolescence allowances |  |  |  |  |  |  |
|  | 2020 |  | 2019 |  | 2018 |
Opening balance |  | 3,386 |  | 2,611 |  | 2,425 |
Additions, net |  | 2,266 |  | 2,228 |  | 1,079 |
Utilization |  | (1,781) |  | (1,459) |  | (987) |
Translation differences |  | (244) |  | 22 |  | 94 |
Balances regarding acquired/divested businesses |  | — |  | (16) |  | — |
Closing balance |  | 3,627 |  | 3,386 |  | 2,611 |

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