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Financial risk management (Details)
 12 Months Ended
Dec. 31, 2020
item
Financial risk management  
Maturing horizon of review of transactions 90 days
Percentage of placements in investment grade countries 58.00%
Percentage of short-term portfolio profile maturing within 1 year 61.00%
Number of individual country risk analyses 40
Number of comprehensive country risk analyses at the beginning of the pandemic 20
Percentage of staff working remotely 100.00%