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Regulatory Matters (Basel Regulatory Capital) (Details) - Transitional Basel III - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
PNC    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 32,478 $ 30,905
Common equity Tier 1 Capital ratio 9.50% 9.60%
Tier 1 Risk-based capital amount $ 36,306 $ 34,735
Tier 1 Risk-based capital ratio 10.70% 10.80%
US regulatory well capitalized level - Tier 1 risk-based capital ratio 6.00% 6.00%
Total Risk-based capital amount $ 43,331 $ 41,606
Total Risk-based capital ratio 12.70% 13.00%
US regulatory well capitalized level - Total risk-based capital ratio 10.00% 10.00%
Leverage amount $ 36,306 $ 34,735
Leverage ratio 9.10% 9.40%
PNC Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 32,215 $ 30,046
Common equity Tier 1 Capital ratio 9.90% 9.80%
US regulatory well capitalized level - Common equity Tier 1 risk-based capital ratio 6.50% 6.50%
Tier 1 Risk-based capital amount $ 32,215 $ 30,046
Tier 1 Risk-based capital ratio 9.90% 9.80%
US regulatory well capitalized level - Tier 1 risk-based capital ratio 8.00% 8.00%
Total Risk-based capital amount $ 39,074 $ 36,510
Total Risk-based capital ratio 12.10% 11.90%
US regulatory well capitalized level - Total risk-based capital ratio 10.00% 10.00%
Leverage amount $ 32,215 $ 30,046
Leverage ratio 8.30% 8.30%
US regulatory well capitalized level - Leverage ratio 5.00% 5.00%