v3.26.1
Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details)
$ in Millions
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 593 599
Fair Value    
Less than Twelve Months $ 5,769 $ 435
Twelve Months or Longer 5,187 5,551
Total 10,956 5,986
Unrealized Loss    
Less than Twelve Months 31 1
Twelve Months or Longer 750 699
Total $ 781 $ 700
Debt Securities | GSE CMOs    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 222 226
Fair Value    
Less than Twelve Months $ 5,138 $ 427
Twelve Months or Longer 2,690 2,993
Total 7,828 3,420
Unrealized Loss    
Less than Twelve Months 29 1
Twelve Months or Longer 394 359
Total $ 423 $ 360
Debt Securities | U.S. Government agency and GSE obligations    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 33 33
Fair Value    
Less than Twelve Months $ 0 $ 0
Twelve Months or Longer 1,285 1,297
Total 1,285 1,297
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 218 206
Total $ 218 $ 206
Debt Securities | GSE certificates    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 321 324
Fair Value    
Less than Twelve Months $ 25 $ 8
Twelve Months or Longer 882 926
Total 907 934
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 125 119
Total $ 125 $ 119
Debt Securities | U. S. Treasury obligations    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 1  
Fair Value    
Less than Twelve Months $ 600  
Twelve Months or Longer 0  
Total 600  
Unrealized Loss    
Less than Twelve Months 2  
Twelve Months or Longer 0  
Total $ 2  
Debt Securities | Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 5 5
Fair Value    
Less than Twelve Months $ 6 $ 0
Twelve Months or Longer 143 152
Total 149 152
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 4 4
Total $ 4 $ 4
Debt Securities | Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 5 5
Fair Value    
Less than Twelve Months $ 0 $ 0
Twelve Months or Longer 146 144
Total 146 144
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 2 3
Total $ 2 $ 3
Debt Securities | Capital trust notes    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 5 5
Fair Value    
Less than Twelve Months $ 0 $ 0
Twelve Months or Longer 37 35
Total 37 35
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 7 8
Total $ 7 $ 8
Debt Securities | Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Number of Debt Securities | security 1 1
Fair Value    
Less than Twelve Months $ 0 $ 0
Twelve Months or Longer 4 4
Total 4 4
Unrealized Loss    
Less than Twelve Months 0 0
Twelve Months or Longer 0 0
Total $ 0 $ 0