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Regulatory Matters (Basel Regulatory Capital) (Details) - Transitional Basel III - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
PNC    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 39,735 $ 32,478
Common equity Tier 1 Capital ratio 12.20% 9.50%
Tier 1 Risk-based capital amount $ 43,252 $ 36,306
Tier 1 Risk-based capital ratio 0.132 0.107
US regulatory well capitalized level - Tier 1 risk-based capital ratio 0.060 0.060
Total Risk-based capital amount $ 51,001 $ 43,331
Total Risk-based capital ratio 0.156 0.127
US regulatory well capitalized level - Total risk-based capital ratio 0.100 0.100
Leverage amount $ 43,252 $ 36,306
Leverage ratio 0.095 0.091
PNC Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 35,232 $ 32,215
Common equity Tier 1 Capital ratio 11.00% 9.90%
US regulatory well capitalized level - Common equity Tier 1 risk-based capital ratio 6.50% 6.50%
Tier 1 Risk-based capital amount $ 35,232 $ 32,215
Tier 1 Risk-based capital ratio 0.110 0.099
US regulatory well capitalized level - Tier 1 risk-based capital ratio 0.080 0.080
Total Risk-based capital amount $ 42,440 $ 39,074
Total Risk-based capital ratio 0.132 0.121
US regulatory well capitalized level - Total risk-based capital ratio 0.100 0.100
Leverage amount $ 35,232 $ 32,215
Leverage ratio 0.079 0.083
US regulatory well capitalized level - Leverage ratio 0.050 0.050