Quarterly report pursuant to Section 13 or 15(d)

ACQUISITION OF TCF FINANCIAL CORPORATION - Narrative (Details)

v3.21.2
ACQUISITION OF TCF FINANCIAL CORPORATION - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 17, 2021
USD ($)
bankingCenter
Jun. 09, 2021
USD ($)
Jun. 09, 2021
USD ($)
Jun. 09, 2021
USD ($)
Rate
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Rate
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Business Acquisition [Line Items]                  
Goodwill         $ 5,316   $ 5,316   $ 1,990
Noninterest Expense         1,289 $ 712 $ 3,154 $ 2,039  
Series C Non-Cumulative Perpetual Preferred Stock                  
Business Acquisition [Line Items]                  
Preferred Stock, Dividend Rate, Percentage | Rate             5.875%    
TCF Financial Corporation                  
Business Acquisition [Line Items]                  
Value of transaction   $ 7,183              
Goodwill   3,326 $ 3,326 $ 3,326          
TCF Financial Corporation | Branches Sold In Connection with Acquisition of TCF Financial Corporation | Held-for-sale                  
Business Acquisition [Line Items]                  
Number of Branches to be Disposed | bankingCenter 14                
Deposits classified as held-for-sale $ 847                
Loans classified as held-for-sale $ 209                
TCF Financial Corporation | Acquisition-related Costs [Member]                  
Business Acquisition [Line Items]                  
Noninterest Expense         $ 234   $ 524    
TCF Financial Corporation | Common Stock                  
Business Acquisition [Line Items]                  
Share issuance ratio     3.0028            
TCF Financial Corporation | Newly created series of preferred stock                  
Business Acquisition [Line Items]                  
Share issuance ratio     1            
TCF Financial Corporation | Common Stock                  
Business Acquisition [Line Items]                  
Consideration transferred, equity interest issued and issuable   6,998              
TCF Financial Corporation | Preferred Stock                  
Business Acquisition [Line Items]                  
Consideration transferred, equity interest issued and issuable   $ 185              
TCF Financial Corporation | Core deposit intangible                  
Business Acquisition [Line Items]                  
Finite-Lived Intangible Asset, Useful Life             10 years    
TCF Financial Corporation | Series C Non-Cumulative Perpetual Preferred Stock                  
Business Acquisition [Line Items]                  
Preferred Stock, Dividend Rate, Percentage     5.70% 5.70%