v3.26.1
Fair Value Measurements - Carrying Amounts and Estimated Fair Values for Certain Financial Instruments (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financial assets:    
Other short-term investments [1] $ 17,456 $ 18,876
Held-to-maturity securities 16,389 11,368
Loans held for sale 1,365 733
Portfolio loans and leases 173,328 120,398
Financial liabilities:    
Deposits 233,621 171,819
Short-term borrowings 1,289 926
Long-term debt [1] 18,753 13,589
Net Carrying Amount    
Financial assets:    
Cash and due from banks 4,084 3,499
Other short-term investments 17,456 18,876
Other securities 798 674
Held-to-maturity securities 16,389 11,368
Loans held for sale 651 75
Portfolio loans and leases 173,223 120,292
Financial liabilities:    
Deposits 233,621 171,819
Short-term borrowings 1,289 926
Long-term debt 18,763 13,579
Net Carrying Amount | Commercial    
Financial assets:    
Portfolio loans and leases 121,039 72,376
Net Carrying Amount | Consumer    
Financial assets:    
Portfolio loans and leases 52,184 47,916
Total Fair Value    
Financial assets:    
Cash and due from banks 4,084 3,499
Other short-term investments 17,456 18,876
Other securities 798 674
Held-to-maturity securities 16,341 11,404
Loans held for sale 651 75
Portfolio loans and leases 174,650 121,352
Financial liabilities:    
Deposits 233,691 171,899
Short-term borrowings 1,289 926
Long-term debt 19,009 14,005
Total Fair Value | Commercial    
Financial assets:    
Portfolio loans and leases 122,758 73,628
Total Fair Value | Consumer    
Financial assets:    
Portfolio loans and leases 51,892 47,724
Total Fair Value | Level 1    
Financial assets:    
Cash and due from banks 4,084 3,499
Other short-term investments 17,456 18,876
Other securities 0 0
Held-to-maturity securities 2,157 2,457
Loans held for sale 0 0
Portfolio loans and leases 0 0
Financial liabilities:    
Deposits 0 0
Short-term borrowings 158 226
Long-term debt 11,694 5,067
Total Fair Value | Level 1 | Commercial    
Financial assets:    
Portfolio loans and leases 0 0
Total Fair Value | Level 1 | Consumer    
Financial assets:    
Portfolio loans and leases 0 0
Total Fair Value | Level 2    
Financial assets:    
Cash and due from banks 0 0
Other short-term investments 0 0
Other securities 798 674
Held-to-maturity securities 14,182 8,945
Loans held for sale 0 0
Portfolio loans and leases 0 0
Financial liabilities:    
Deposits 233,691 171,899
Short-term borrowings 1,131 700
Long-term debt 7,315 8,938
Total Fair Value | Level 2 | Commercial    
Financial assets:    
Portfolio loans and leases 0 0
Total Fair Value | Level 2 | Consumer    
Financial assets:    
Portfolio loans and leases 0 0
Total Fair Value | Level 3    
Financial assets:    
Cash and due from banks 0 0
Other short-term investments 0 0
Other securities 0 0
Held-to-maturity securities 2 2
Loans held for sale 651 75
Portfolio loans and leases 174,650 121,352
Financial liabilities:    
Deposits 0 0
Short-term borrowings 0 0
Long-term debt 0 0
Total Fair Value | Level 3 | Commercial    
Financial assets:    
Portfolio loans and leases 122,758 73,628
Total Fair Value | Level 3 | Consumer    
Financial assets:    
Portfolio loans and leases $ 51,892 $ 47,724
[1] Includes $38 and $38 of other short-term investments, $463 and $554 of portfolio loans and leases, $(8) and $(9) of ALLL, $3 and $3 of other assets, $10 and $11 of other liabilities and $391 and $473 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2026 and December 31, 2025, respectively. For further information, refer to Note 10.