v3.25.4
Fair value of financial instruments - Disclosure of significant unobservable inputs (Details) - Level 3
Dec. 31, 2025
Dec. 31, 2024
Min | Loans | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0194 0.0194
Min | Loans | Discounted cash flows | Yield    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.05 0.02
Min | Loans | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0780 0.0230
Min | Loans | Discounted cash flows | Loan spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0030 0.0035
Min | Loans | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0 0
Min | Private equity investments | Multi-Period Excess EBITDA Method | EBITDA multiple    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 6 0
Min | Asset backed securities | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   (0.0137)
Min | Asset backed securities | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   0.15
Min | Asset backed securities | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0 0
Min | Corporate debt | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0 0
Min | Government and Government sponsored debt | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0 0
Min | Issued debt | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0080 0.0050
Min | Issued debt | Option model | Interest rate volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0037 0.0019
Min | Issued debt | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.01 0.01
Min | Reverse repurchase and repurchase agreements | Discounted cash flows | Repo spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0100 0.0014
Min | Interest rate derivatives | Discounted cash flows | Inflation forwards    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   0.03
Min | Interest rate derivatives | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0008 0.0014
Min | Interest rate derivatives | Discounted cash flows | Yield    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0 0
Min | Interest rate derivatives | Option model | Interest rate volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0029 0.0019
Min | Interest rate derivatives | Option model | FX - IR correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities (0.36) (0.36)
Min | Interest rate derivatives | Option model | IR - IR correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.35 0.33
Min | Interest rate derivatives | Option model | IR - Inflation correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.10 0.10
Min | Interest rate derivatives | Option model | Inflation - Inflation correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.05 0.05
Min | Equity derivatives | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities (0.0190) (0.0215)
Min | Equity derivatives | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.01 0.01
Min | Equity derivatives | Option model | Equity - equity correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.15 0.40
Max | Loans | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0420 0.1011
Max | Loans | Discounted cash flows | Yield    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.08 0.18
Max | Loans | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.1170 0.0345
Max | Loans | Discounted cash flows | Loan spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0942 0.0908
Max | Loans | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 186 240
Max | Private equity investments | Multi-Period Excess EBITDA Method | EBITDA multiple    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 17 0
Max | Asset backed securities | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   (0.0025)
Max | Asset backed securities | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   32
Max | Asset backed securities | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 530 125
Max | Corporate debt | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 239 2,322
Max | Government and Government sponsored debt | Comparable pricing | Comparable price    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 231 123
Max | Issued debt | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0120 0.0198
Max | Issued debt | Option model | Interest rate volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0178 0.0211
Max | Issued debt | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.95 1.11
Max | Reverse repurchase and repurchase agreements | Discounted cash flows | Repo spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0148 0.0186
Max | Interest rate derivatives | Discounted cash flows | Inflation forwards    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities   0.03
Max | Interest rate derivatives | Discounted cash flows | Credit spread    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.2070 0.1972
Max | Interest rate derivatives | Discounted cash flows | Yield    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.05 0.12
Max | Interest rate derivatives | Option model | Interest rate volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0152 0.0175
Max | Interest rate derivatives | Option model | FX - IR correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.30 0.30
Max | Interest rate derivatives | Option model | IR - IR correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.98 0.98
Max | Interest rate derivatives | Option model | IR - Inflation correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.10 0.10
Max | Interest rate derivatives | Option model | Inflation - Inflation correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.05 0.05
Max | Equity derivatives | Discounted cash flows | Discount margin    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.0350 0.0351
Max | Equity derivatives | Option model | Equity volatility    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 0.88 1.33
Max | Equity derivatives | Option model | Equity - equity correlation    
Disclosure of detailed information about financial instruments [line items]    
Significant unobservable inputs, assets and liabilities 1 1