Regulatory Matters (Basel Regulatory Capital) (Details) - Transitional Basel III - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
PNC
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 Capital amount	$ 41,974	$ 39,685
Common equity Tier 1 Capital ratio	9.90%	9.10%
Tier 1 Risk-based capital amount	$ 48,215	$ 45,431
Tier 1 Risk-based capital ratio	0.114	0.104
US regulatory well capitalized level - Tier 1 risk-based capital ratio	0.060	0.060
Total Risk-based capital amount	$ 55,932	$ 53,440
Total Risk-based capital ratio	0.132	0.123
US regulatory well capitalized level - Total risk-based capital ratio	0.100	0.100
Leverage amount	$ 48,215	$ 45,431
Leverage ratio	0.087	0.082
PNC Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 Capital amount	$ 47,273	$ 43,658
Common equity Tier 1 Capital ratio	11.30%	10.20%
US regulatory well capitalized level - Common equity Tier 1 risk-based capital ratio	6.50%	6.50%
Tier 1 Risk-based capital amount	$ 47,273	$ 43,658
Tier 1 Risk-based capital ratio	0.113	0.102
US regulatory well capitalized level - Tier 1 risk-based capital ratio	0.080	0.080
Total Risk-based capital amount	$ 54,140	$ 50,666
Total Risk-based capital ratio	0.129	0.118
US regulatory well capitalized level - Total risk-based capital ratio	0.100	0.100
Leverage amount	$ 47,273	$ 43,658
Leverage ratio	0.086	0.080
US regulatory well capitalized level - Leverage ratio	0.050	0.050