v3.22.0.1
Regulatory Capital Requirements and Regulations (Tables)
12 Months Ended
Dec. 31, 2021
Banking and Thrift, Other Disclosures [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations
The following tables summarize the applicable holding company and bank regulatory capital requirements:
 
December 31, 2021 (1)
Minimum RequirementTo Be Well
Capitalized
 AmountRatio
(Dollars in millions)
Common equity Tier 1 capital:
Regions Financial Corporation$10,844 9.57 %4.50 %N/A
Regions Bank12,478 11.05 4.50 6.50 %
Tier 1 capital:
Regions Financial Corporation$12,503 11.03 %6.00 %6.00 %
Regions Bank12,478 11.05 6.00 8.00 
Total capital:
Regions Financial Corporation$14,441 12.74 %8.00 %10.00 %
Regions Bank13,985 12.38 8.00 10.00 
Leverage capital:
Regions Financial Corporation$12,503 8.08 %4.00 %N/A
Regions Bank12,478 8.09 4.00 5.00 %

 December 31, 2020Minimum RequirementTo Be Well
Capitalized
 AmountRatio
(Dollars in millions)
Common equity Tier 1 capital:
Regions Financial Corporation$10,525 9.84 %4.50 %N/A
Regions Bank12,972 12.17 4.50 6.50 %
Tier 1 capital:
Regions Financial Corporation$12,181 11.39 %6.00 %6.00 %
Regions Bank12,972 12.17 6.00 8.00 
Total capital:
Regions Financial Corporation$14,498 13.56 %8.00 %10.00 %
Regions Bank14,803 13.89 8.00 10.00 
Leverage capital:
Regions Financial Corporation$12,181 8.71 %4.00 %N/A
Regions Bank12,972 9.30 4.00 5.00 %
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(1)The 2021 Basel III CET1 capital, Tier 1 capital, Total capital, and Leverage capital ratios are estimated.