v3.20.4
Discontinued Operations (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net interest income $ 3,894 $ 3,745 $ 3,735
Non-interest income:      
Gain (Loss) on Disposition of Business 0 0 (281)
Total non-interest Income 2,393 2,116 2,019
Non-interest expense:      
Salaries and employee benefits 2,100 1,916 1,947
Net occupancy expense 313 321 335
Furniture and equipment expense 348 325 325
Other 882 927 963
Non-interest expense 3,643 3,489 3,570
Income from discontinued operations before income taxes 0 0 271
Income tax expense 0 0 80
Income from discontinued operations, net of tax $ 0 $ 0 $ 191
Earnings per common share from discontinued operations:      
Basic $ 0.00 $ 0.00 $ 0.18
Diluted $ 0.00 $ 0.00 $ 0.17
Discontinued Operations [Member]      
Non-interest expense:      
Income from discontinued operations before income taxes $ 0 $ 0 $ 271
Income tax expense 0 0 80
Income from discontinued operations, net of tax $ 0 $ 0 $ 191
Earnings per common share from discontinued operations:      
Basic $ 0.00 $ 0.00 $ 0.18
Diluted $ 0.00 $ 0.00 $ 0.17
Regions Insurance Group [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposal Group, Including Discontinued Operation, Interest Income     $ 1
Disposal Group, Including Discontinued Operation, Interest Expense     0
Net interest income     1
Non-interest income:      
Gain (Loss) on Sale of Securities, Net (Excluding Trading Securities)     (1)
Insurance Commissions and Fees     69
Gain (Loss) on Disposition of Business     281
Other Non-Interest Income     0
Total non-interest Income     349
Non-interest expense:      
Salaries and employee benefits     49
Net occupancy expense     3
Furniture and equipment expense     2
Other     16
Non-interest expense     70
Income from discontinued operations before income taxes     280
Income tax expense     84
Income from discontinued operations, net of tax     196
Earnings per common share from discontinued operations:      
Gain (Loss) on Disposition of Business, net of tax     $ 196