v3.26.1
Investment Securities - AFS and HTM Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
AFS securities    
AFS securities: Amortized cost, total $ 112,050.0 $ 112,522.0
Gross Unrealized Gains 104.0 223.0
Gross Unrealized Losses 2,337.0 2,279.0
Fair Value 109,817.0 110,466.0
Amortized cost, unalloccated basis adjustment 0.3 2.0
Gross unrealized gains, unallocated basis adjustment 0.0 0.0
Gross unrealized losses, unallocated basis adjustment 0.0 2.0
HTM securities    
HTM securities: Net carrying amount, total 50,546.0 53,090.0
Gross Unrealized Gains 60.0 79.0
Gross Unrealized Losses 7,613.0 7,554.0
Fair Value 42,993.0 45,615.0
Investment securities: amortized cost, total 162,596.0 165,612.0
Gross Unrealized Gains 164.0 302.0
Gross Unrealized Losses 9,950.0 9,833.0
Investment securities: fair value, total 152,810.0 156,081.0
U.S. Treasury securities    
AFS securities    
AFS securities: Amortized cost, total 80,724.0 80,745.0
Gross Unrealized Gains 77.0 187.0
Gross Unrealized Losses 63.0 25.0
Fair Value 80,738.0 80,907.0
HTM securities    
HTM securities: Net carrying amount, total 10,457.0 12,299.0
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses 689.0 663.0
Fair Value 9,768.0 11,636.0
U.S. agency securities    
AFS securities    
AFS securities: Amortized cost, total 24,022.0 24,031.0
Gross Unrealized Gains 24.0 24.0
Gross Unrealized Losses 1,966.0 1,943.0
Fair Value 22,080.0 22,112.0
HTM securities    
HTM securities: Net carrying amount, total 37,602.0 38,303.0
Gross Unrealized Gains 51.0 67.0
Gross Unrealized Losses 6,811.0 6,785.0
Fair Value 30,842.0 31,585.0
Agency CMBS    
AFS securities    
AFS securities: Amortized cost, total 5,326.0 5,504.0
Gross Unrealized Gains 1.0 1.0
Gross Unrealized Losses 276.0 286.0
Fair Value 5,051.0 5,219.0
HTM securities    
HTM securities: Net carrying amount, total 619.0 709.0
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses 41.0 43.0
Fair Value 578.0 666.0
State and municipal securities    
AFS securities    
AFS securities: Amortized cost, total 1,535.0 1,754.0
Gross Unrealized Gains 1.0 10.0
Gross Unrealized Losses 25.0 17.0
Fair Value 1,511.0 1,747.0
FFELP student loan ABS:    
AFS securities    
AFS securities: Amortized cost, total 443.0 486.0
Gross Unrealized Gains 1.0 1.0
Gross Unrealized Losses 7.0 6.0
Fair Value $ 437.0 $ 481.0
HTM securities    
Third party guarantees (as a percent) 95.00% 95.00%
Non-agency CMBS    
HTM securities    
HTM securities: Net carrying amount, total $ 1,868.0 $ 1,779.0
Gross Unrealized Gains 9.0 12.0
Gross Unrealized Losses 72.0 63.0
Fair Value $ 1,805.0 $ 1,728.0