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Segmentation of key figures (Details 6) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of major customers [line items] |  |  |
Customers with net sales over five percent | The Group’s largest, second-largest and third-largest customers account for approximately 16%, 11% and 7% of net sales to third parties, respectively (2021: 17%, 11% and 6%, respectively; 2020: 17%, 11% and 6%, respectively). All segments had sales to these customers in 2022, 2021 and 2020. The highest amounts of trade receivables outstanding were for these same three customers and amounted to approximately 16%, 14% and 7%, respectively, of the trade receivables at December 31, 2022 (2021: 16%, 12% and 7%, respectively). |  |
Largest customer [member] |  |  |
Disclosure of major customers [line items] |  |  |
Percentage of entity's revenue | 16.00% | 17.00% | 17.00%
Percentage of entitys trade receivable | 16.00% | 16.00% |
Second largest customer [member] |  |  |
Disclosure of major customers [line items] |  |  |
Percentage of entity's revenue | 11.00% | 11.00% | 11.00%
Percentage of entitys trade receivable | 14.00% | 12.00% |
Third largest customer [member] |  |  |
Disclosure of major customers [line items] |  |  |
Percentage of entity's revenue | 7.00% | 6.00% | 6.00%
Percentage of entitys trade receivable | 7.00% | 7.00% |

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