v3.25.4
Investments - Held-to-maturity Securities by Type and Tenor (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Amortized Cost    
Amortized Cost $ 69,193 $ 78,713
Fair Value    
Fair Value $ 69,721 $ 78,038
Held-to-maturity securities, weighted average yield 4.20% 4.09%
Held-to-maturity securities, gross unrealized gains $ 643 $ 121
Held-to-maturity securities, gross unrealized losses 115 796
U.S. government obligations    
Amortized Cost    
Less than 1 year 11,336 15,449
1 year to 5 years 33,900 42,420
Greater than 10 years 1  
Amortized Cost 45,237 57,869
Fair Value    
Less than 1 year 11,312 15,409
1 year to 5 years 34,214 41,939
Greater than 10 years 1  
Fair Value $ 45,527 $ 57,348
Less than 1 year 3.02% 3.46%
1 year to 5 years 3.90% 3.66%
Greater than 10 years 3.81%  
Held-to-maturity securities, weighted average yield 3.68% 3.61%
U.S. agency obligations    
Amortized Cost    
Greater than 10 years $ 23,785 $ 20,637
Amortized Cost 23,785 20,637
Fair Value    
Greater than 10 years 24,022 20,482
Fair Value $ 24,022 $ 20,482
Greater than 10 years 5.18% 5.42%
Held-to-maturity securities, weighted average yield 5.18% 5.42%
Asset-Backed Securities    
Amortized Cost    
1 year to 5 years   $ 2
5 years to 10 years $ 8  
Greater than 10 years 163 205
Amortized Cost 171 207
Fair Value    
1 year to 5 years   2
5 years to 10 years 7  
Greater than 10 years 165 206
Fair Value $ 172 $ 208
1 year to 5 years   7.50%
5 years to 10 years 6.33%  
Greater than 10 years 3.93% 5.25%
Held-to-maturity securities, weighted average yield 4.04% 5.29%