Significant accounting policies, Summary of Discount Rates (Details) |
Dec. 31, 2020 |
[1] | ||
|---|---|---|---|---|
| EMEA [Member] | Bottom of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 3.00% | |||
| EMEA [Member] | Top of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 5.00% | |||
| North America [Member] | Bottom of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 4.00% | |||
| North America [Member] | Top of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 5.00% | |||
| South America [Member] | Bottom of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 5.00% | |||
| South America [Member] | Top of Range [Member] | ||||
| Cash-generating units [Abstract] | ||||
| Discount rate | 7.00% | |||
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