v3.26.1
Financial risk management - Summary Of Group Determines Its Level Of Risk (Detail)
Dec. 31, 2025
Dec. 31, 2024
Global [Member] | Grade Lower than Standard Rating From CCC to C [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 23.87% 23.31%
Latin America [Member] | High Grade Rating from AAA to A [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.00% 0.00%
Latin America [Member] | Grade Lower than Standard Rating From CCC to C [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 22.47% 22.32%
Sovereigns [Member] | High Grade Rating from AAA to A [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.00% 0.00%
Sovereigns [Member] | Grade Lower than Standard Rating From CCC to C [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 25.00% 26.56%
Bottom of range [member] | Global [Member] | High Grade Rating from AAA to A [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.05% 0.05%
Bottom of range [member] | Global [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.12% 0.12%
Bottom of range [member] | Latin America [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.08% 0.08%
Bottom of range [member] | Sovereigns [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.00% 0.00%
Top of range [member] | Global [Member] | High Grade Rating from AAA to A [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 0.11% 0.11%
Top of range [member] | Global [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 2.02% 2.03%
Top of range [member] | Latin America [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 2.98% 3.03%
Top of range [member] | Sovereigns [Member] | Standard Grade Rating From BBB to B [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Probability of Default Percentage 1.71% 1.78%