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Financial Derivatives (Credit-Risk Contingent Features) (Details) - USD ($)
$ in Billions
Dec. 31, 2022
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Aggregate fair value of all derivative instruments with credit-risk-related contingent features $ 5.8 $ 2.4
Collateral posted on derivative instruments with credit-risk-related contingent features 1.7 1.8
Maximum amount of collateral PNC would have been required to post if the credit-risk-related contingent features underlying these agreements had been triggered $ 4.1 $ 0.6