v3.26.1
Investment Securities - AFS and HTM Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
AFS securities    
AFS securities: Amortized cost, total $ 107,761.0 $ 112,522.0
Gross Unrealized Gains 143.0 223.0
Gross Unrealized Losses 2,372.0 2,279.0
Fair Value 105,532.0 110,466.0
Amortized cost, unalloccated basis adjustment (1.1) 2.0
Gross unrealized gains, unallocated basis adjustment 1.0 0.0
Gross unrealized losses, unallocated basis adjustment 0.0 2.0
HTM securities    
HTM securities: Net carrying amount, total 47,747.0 53,090.0
Gross Unrealized Gains 83.0 79.0
Gross Unrealized Losses 7,592.0 7,554.0
Fair Value 40,238.0 45,615.0
Investment securities: amortized cost, total 155,508.0 165,612.0
Gross Unrealized Gains 226.0 302.0
Gross Unrealized Losses 9,964.0 9,833.0
Investment securities: fair value, total 145,770.0 156,081.0
U.S. Treasury securities    
AFS securities    
AFS securities: Amortized cost, total 76,066.0 80,745.0
Gross Unrealized Gains 85.0 187.0
Gross Unrealized Losses 125.0 25.0
Fair Value 76,026.0 80,907.0
HTM securities    
HTM securities: Net carrying amount, total 8,455.0 12,299.0
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses 704.0 663.0
Fair Value 7,751.0 11,636.0
U.S. agency securities    
AFS securities    
AFS securities: Amortized cost, total 24,131.0 24,031.0
Gross Unrealized Gains 35.0 24.0
Gross Unrealized Losses 1,962.0 1,943.0
Fair Value 22,204.0 22,112.0
HTM securities    
HTM securities: Net carrying amount, total 36,738.0 38,303.0
Gross Unrealized Gains 45.0 67.0
Gross Unrealized Losses 6,802.0 6,785.0
Fair Value 29,981.0 31,585.0
Agency CMBS    
AFS securities    
AFS securities: Amortized cost, total 5,006.0 5,504.0
Gross Unrealized Gains 1.0 1.0
Gross Unrealized Losses 270.0 286.0
Fair Value 4,737.0 5,219.0
HTM securities    
HTM securities: Net carrying amount, total 589.0 709.0
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses 38.0 43.0
Fair Value 551.0 666.0
State and municipal securities    
AFS securities    
AFS securities: Amortized cost, total 2,142.0 1,754.0
Gross Unrealized Gains 20.0 10.0
Gross Unrealized Losses 9.0 17.0
Fair Value 2,153.0 1,747.0
FFELP student loan ABS:    
AFS securities    
AFS securities: Amortized cost, total 417.0 486.0
Gross Unrealized Gains 1.0 1.0
Gross Unrealized Losses 6.0 6.0
Fair Value $ 412.0 $ 481.0
HTM securities    
Third party guarantees (as a percent) 95.00% 95.00%
Non-agency mortgage-backed securities    
HTM securities    
HTM securities: Net carrying amount, total $ 1,965.0 $ 1,779.0
Gross Unrealized Gains 38.0 12.0
Gross Unrealized Losses 48.0 63.0
Fair Value $ 1,955.0 $ 1,728.0