v3.25.4
Financial Investments - Weighted average yields of investment debt securities (Details)
Dec. 31, 2025
US Treasury | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 2.90%
US Treasury | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.70%
US Treasury | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 2.30%
US Treasury | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 2.30%
US Treasury | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 3.20%
US Treasury | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.80%
US Treasury | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 3.70%
US Treasury | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 2.00%
US Government agencies | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
US Government agencies | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.00%
US Government agencies | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 4.40%
US Government agencies | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 3.50%
US Government agencies | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 4.50%
US Government agencies | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 4.30%
US Government agencies | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 4.00%
US Government agencies | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 4.70%
US Government-sponsored agencies | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 1.80%
US Government-sponsored agencies | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 1.60%
US Government-sponsored agencies | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 4.10%
US Government-sponsored agencies | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 1.80%
US Government-sponsored agencies | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
US Government-sponsored agencies | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 2.90%
US Government-sponsored agencies | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 3.70%
US Government-sponsored agencies | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 2.90%
UK Government | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
UK Government | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.80%
UK Government | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 2.60%
UK Government | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 1.90%
UK Government | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
UK Government | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.30%
UK Government | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 3.00%
UK Government | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Hong Kong Government | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 1.40%
Hong Kong Government | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 2.50%
Hong Kong Government | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 2.70%
Hong Kong Government | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Hong Kong Government | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 2.50%
Hong Kong Government | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 2.70%
Hong Kong Government | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Hong Kong Government | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Other governments | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 2.80%
Other governments | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 4.20%
Other governments | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 4.30%
Other governments | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 2.20%
Other governments | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 3.20%
Other governments | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.10%
Other governments | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 2.50%
Other governments | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 8.00%
Asset-backed securities | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
Asset-backed securities | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 4.40%
Asset-backed securities | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 3.90%
Asset-backed securities | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 3.30%
Asset-backed securities | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 0.00%
Asset-backed securities | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Asset-backed securities | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 7.30%
Asset-backed securities | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 0.00%
Corporate debt and other securities | Financial investments - measured at fair value through other comprehensive income | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 3.20%
Corporate debt and other securities | Financial investments - measured at fair value through other comprehensive income | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.90%
Corporate debt and other securities | Financial investments - measured at fair value through other comprehensive income | 5–10 years  
Disclosure of financial assets [line items]  
Yield 4.20%
Corporate debt and other securities | Financial investments - measured at fair value through other comprehensive income | Over 10 years  
Disclosure of financial assets [line items]  
Yield 1.30%
Corporate debt and other securities | Financial investments - measured at amortised cost | Less than 1 year  
Disclosure of financial assets [line items]  
Yield 3.20%
Corporate debt and other securities | Financial investments - measured at amortised cost | 1 to 5 years  
Disclosure of financial assets [line items]  
Yield 3.40%
Corporate debt and other securities | Financial investments - measured at amortised cost | 5–10 years  
Disclosure of financial assets [line items]  
Yield 3.80%
Corporate debt and other securities | Financial investments - measured at amortised cost | Over 10 years  
Disclosure of financial assets [line items]  
Yield 4.80%