(in millions of euros) | 2020 | 2019 |
Costs of subcontracted work | 186 | 143 |
Remediation costs | 96 | 99 |
Maintenance | 261 | 185 |
Automation costs | 204 | 207 |
Total | 747 | 634 |
The costs of subcontracted work are the costs relating to the execution of assignments by third parties that are not covered by the other items in this category.