XML 134 R118.htm IDEA: XBRL DOCUMENT v3.20.4
Borrowings - Narrative (Details) - USD ($)
12 Months Ended
Jul. 02, 2024
Jun. 29, 2020
Dec. 31, 2020
May 06, 2020
Dec. 31, 2019
Debt Instrument [Line Items]          
Issuance amount       $ 150,000,000.0  
Initial fixed interest rate       5.50%  
Issuance costs       $ 1,500,000  
FHLB advances          
Debt Instrument [Line Items]          
Loans pledged as collateral     $ 12,500,000,000   $ 10,500,000,000
Federal Reserve Bank Advances          
Debt Instrument [Line Items]          
Loans pledged as collateral     3,200,000,000   903,100,000
FHLB advances, amount prepayable     $ 0   $ 0
2029 Notes | Three-Month LIBOR | Scenario, Forecast | Subordinated bank notes          
Debt Instrument [Line Items]          
Floating-rate 2.375%        
Revolving Line-of-Credit | Eurocurrency Rate          
Debt Instrument [Line Items]          
Floating-rate     1.50%    
Revolving Line-of-Credit | Amended TCF Financial Corporation, Line-of-Credit          
Debt Instrument [Line Items]          
Repayment of revolving credit facility   $ 80,000,000.0      
Maximum borrowing capacity   $ 150,000,000.0