v3.25.4
Borrowed Funds - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Nov. 04, 2002
Debt Instrument        
Interest payable $ 39,000,000 $ 51,000,000    
FHLB lock out term 5 years      
Advances and letters of credit $ 8,300,000,000 7,000,000,000.0    
Warrant or right, coupon rate       6.00%
Warrant term       49 years
Settlement terms, fair value of shares amount $ 183,000,000      
Settlement terms, period 49 years      
Outstanding principal amount $ 212,000,000      
Deferrable term 5 years      
Interest expenses on junior subordinated debentures $ 44,000,000 49,000,000 $ 48,000,000  
Subordinated notes 448,000,000 $ 444,000,000    
New York Community Capital Trust V (BONUSES Units)        
Debt Instrument        
Junior subordinated debentures 148,000,000      
Unamortized discount 92,000,000      
BONUSES Units        
Debt Instrument        
Offering price (in dollars per share)       $ 50.00
Warrant outstanding (in shares)       5,500,000
Warrants proceeds amount       $ 275,000,000
Unamortized discount 64,000,000      
BONUSES Units | New York Community Capital Trust V (BONUSES Units)        
Debt Instrument        
Unamortized discount $ 92,000,000