v3.26.1
Investment Securities - Schedule of Investment Portfolio (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Available-for-sale securities    
Amortized cost basis $ 26,222,000,000 $ 25,825,000,000
Gross unrealized gains 26,000,000 76,000,000
Gross unrealized losses (2,995,000,000) (2,928,000,000)
Fair value 23,253,000,000 22,973,000,000
Held-to-maturity securities    
Amortized cost basis 4,286,000,000 4,371,000,000
Gross unrealized gains 175,000,000 237,000,000
Gross unrealized losses (162,000,000) (157,000,000)
Fair value 4,299,000,000 4,451,000,000
Debt securities, available-for-sale, accrued interest receivable $ 91,000,000 $ 87,000,000
Debt securities, available-for-sale, accrued interest, after allowance for credit loss, statement of financial position [extensible enumeration] Other assets Other assets
Debt securities, available-for-sale, allowance for credit loss, excluding accrued interest $ 0 $ 0
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest 0 0
Debt securities, held-to-maturity, accrued interest receivable 12,000,000 13,000,000
Operating Segments | Insurance operations    
Held-to-maturity securities    
Deposited securities 14,000,000 14,000,000
Asset Pledged as Collateral with Right    
Available-for-sale securities    
Fair value 3,600,000,000 3,700,000,000
Held-to-maturity securities    
Securities with the right to sell or pledge 1,000,000,000.0 932,000,000
Asset Pledged as Collateral with Right | Federal Home Loan Bank Advances    
Held-to-maturity securities    
Securities with the right to sell or pledge 2,600,000,000 2,700,000,000
U.S. Treasury and federal agencies    
Available-for-sale securities    
Amortized cost basis 2,579,000,000 2,308,000,000
Gross unrealized gains 0 22,000,000
Gross unrealized losses (64,000,000) (51,000,000)
Fair value 2,515,000,000 2,279,000,000
U.S. States and political subdivisions    
Available-for-sale securities    
Amortized cost basis 543,000,000 624,000,000
Gross unrealized gains 1,000,000 1,000,000
Gross unrealized losses (65,000,000) (74,000,000)
Fair value 479,000,000 551,000,000
Foreign government    
Available-for-sale securities    
Amortized cost basis 194,000,000 191,000,000
Gross unrealized gains 1,000,000 1,000,000
Gross unrealized losses (3,000,000) (4,000,000)
Fair value 192,000,000 188,000,000
Agency mortgage-backed residential    
Available-for-sale securities    
Amortized cost basis 14,903,000,000 14,966,000,000
Gross unrealized gains 12,000,000 19,000,000
Gross unrealized losses (2,126,000,000) (2,084,000,000)
Fair value 12,789,000,000 12,901,000,000
Held-to-maturity securities    
Amortized cost basis 1,364,000,000 1,303,000,000
Gross unrealized gains 3,000,000 8,000,000
Gross unrealized losses (162,000,000) (157,000,000)
Fair value 1,205,000,000 1,154,000,000
Hedged liability, fair value hedge, cumulative increase (decrease) 80,000,000  
Hedged asset, fair value hedge, cumulative increase (decrease)   13,000,000
Mortgage-backed residential    
Available-for-sale securities    
Amortized cost basis 221,000,000 230,000,000
Gross unrealized gains 0 0
Gross unrealized losses (33,000,000) (32,000,000)
Fair value 188,000,000 198,000,000
Held-to-maturity securities    
Amortized cost basis 2,886,000,000 3,018,000,000
Gross unrealized gains 172,000,000 228,000,000
Gross unrealized losses 0 0
Fair value 3,058,000,000 3,246,000,000
Agency mortgage-backed commercial    
Available-for-sale securities    
Amortized cost basis 5,770,000,000 5,540,000,000
Gross unrealized gains 3,000,000 14,000,000
Gross unrealized losses (636,000,000) (622,000,000)
Fair value 5,137,000,000 4,932,000,000
Held-to-maturity securities    
Hedged liability, fair value hedge, cumulative increase (decrease) 19,000,000  
Hedged asset, fair value hedge, cumulative increase (decrease)   33,000,000
Asset-backed    
Available-for-sale securities    
Amortized cost basis 1,000,000 12,000,000
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Fair value 1,000,000 12,000,000
Held-to-maturity securities    
Amortized cost basis 36,000,000 50,000,000
Gross unrealized gains 0 1,000,000
Gross unrealized losses 0 0
Fair value 36,000,000 51,000,000
Corporate debt    
Available-for-sale securities    
Amortized cost basis 2,011,000,000 1,954,000,000
Gross unrealized gains 9,000,000 19,000,000
Gross unrealized losses (68,000,000) (61,000,000)
Fair value $ 1,952,000,000 $ 1,912,000,000