XML 80 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 24, 2020
Jun. 30, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 000-08185    
Entity Registrant Name TCF Financial Corporation    
Entity Incorporation, State or Country Code MI    
Entity Tax Identification Number 38-2022454    
Entity Address, Address Line One 333 W. Fort Street, Suite 1800    
Entity Address, City or Town Detroit    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48226    
City Area Code (800)    
Local Phone Number 867-9757    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 2,866,504,997
Entity Common Stock, Shares Outstanding   152,776,438  
Documents Incorporated by Reference
Specific portions of the Registrant's definitive Proxy Statement for the 2020 Annual Meeting of Shareholders to be held on May 6, 2020 are incorporated by reference into Part III hereof.
   
Entity Central Index Key 0000019612    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
TCF Common Stock      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock (par value $1 per share)    
Trading Symbol TCF    
Depositary Shares      
Entity Information [Line Items]      
Title of 12(b) Security Depositary shares, each representing a 1/1000th interest in a share of the 5.70% Series C Non-Cumulative Perpetual Preferred Stock    
Trading Symbol TCFCP