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Regulatory Matters (Basel Regulatory Capital) (Details) - Transitional Basel III - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
PNC    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 30,905 $ 32,146
Common equity Tier 1 Capital ratio 9.60% 10.40%
Tier 1 Risk-based capital amount $ 34,735 $ 36,007
Tier 1 Risk-based capital ratio 10.80% 11.60%
US regulatory well capitalized level - Tier 1 risk-based capital ratio 6.00% 6.00%
Total Risk-based capital amount $ 41,606 $ 42,496
Total Risk-based capital ratio 13.00% 13.70%
US regulatory well capitalized level - Total risk-based capital ratio 10.00% 10.00%
Leverage amount $ 34,735 $ 36,007
Leverage ratio 9.40% 9.90%
PNC Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 Capital amount $ 30,046 $ 28,771
Common equity Tier 1 Capital ratio 9.80% 9.70%
US regulatory well capitalized level - Common equity Tier 1 risk-based capital ratio 6.50% 6.50%
Tier 1 Risk-based capital amount $ 30,046 $ 28,942
Tier 1 Risk-based capital ratio 9.80% 9.70%
US regulatory well capitalized level - Tier 1 risk-based capital ratio 8.00% 8.00%
Total Risk-based capital amount $ 36,510 $ 34,756
Total Risk-based capital ratio 11.90% 11.70%
US regulatory well capitalized level - Total risk-based capital ratio 10.00% 10.00%
Leverage amount $ 30,046 $ 28,942
Leverage ratio 8.30% 8.20%
US regulatory well capitalized level - Leverage ratio 5.00% 5.00%