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Note 7 - Risk Management - Unfavorable scenario for GDP unemployment rate estimates for major geographies (Details)
 12 Months Ended
Dec. 31, 2020
Spain Member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (11,76%)
Period 2021 5,37%
Period 2022 5,82%
Period 2023 2,88%
Period 2024 2,03%
Period 2025 1,97%
Spain Member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 17,44%
Period 2021 18,94%
Period 2022 15,92%
Period 2023 13,99%
Period 2024 12,70%
Period 2025 11,45%
Spain Member [Member] | HPI Member [Member]  
Year Line Item  
Period 2020 (2,60%)
Period 2021 (6,69%)
Period 2022 2,49%
Period 2023 4,94%
Period 2024 2,45%
Period 2025 2,36%
Mexico Member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (9,64%)
Period 2021 2,84%
Period 2022 3,25%
Period 2023 1,48%
Period 2024 1,41%
Period 2025 1,41%
Mexico Member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 4,67%
Period 2021 5,75%
Period 2022 5,53%
Period 2023 5,34%
Period 2024 5,17%
Period 2025 5,02%
Mexico Member [Member] | HPI Member [Member]  
Year Line Item  
Period 2020 1,89%
Period 2021 (1,48%)
Period 2022 (0,06%)
Period 2023 0,17%
Period 2024 0,99%
Period 2025 1,70%
Turkey Member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (2,10%)
Period 2021 1,75%
Period 2022 3,56%
Period 2023 3,92%
Period 2024 3,91%
Period 2025 3,91%
Turkey Member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 14,49%
Period 2021 15,51%
Period 2022 13,64%
Period 2023 12,33%
Period 2024 11,56%
Period 2025 11,20%
Peru member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (14,33%)
Period 2021 7,53%
Period 2022 3,78%
Period 2023 3,69%
Period 2024 3,57%
Period 2025 3,35%
Peru member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 12,85%
Period 2021 10,69%
Period 2022 10,48%
Period 2023 9,15%
Period 2024 7,62%
Period 2025 7,27%
Argentina Member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (15,28%)
Period 2021 0,89%
Period 2022 1,33%
Period 2023 1,86%
Period 2024 1,83%
Period 2025 1,86%
Argentina Member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 14,34%
Period 2021 16,38%
Period 2022 13,69%
Period 2023 10,19%
Period 2024 8,63%
Period 2025 7,75%
Colombia Member [Member] | GDP Member [Member]  
Year Line Item  
Period 2020 (8,25%)
Period 2021 4,16%
Period 2022 3,16%
Period 2023 3,15%
Period 2024 3,27%
Period 2025 3,60%
Colombia Member [Member] | Unemployment Member [Member]  
Year Line Item  
Period 2020 18,31%
Period 2021 16,66%
Period 2022 15,10%
Period 2023 14,84%
Period 2024 13,04%
Period 2025 12,80%