Commitments and Guarantees (Internal Credit Ratings Related to Net Outstanding Standby Letters of Credit) (Details) - Standby letters of credit [Member]	Sep. 30, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Internal credit ratings (as a percentage of portfolio) - Pass	92.00%	93.00%
Internal credit ratings (as a percentage of portfolio) - Below pass	8.00%	7.00%

Percentage of standby letters of credit (including risk participations in standby letters of credit and bankers' acceptances issued by other financial institutions) with an internal credit rating of below pass, indicating a higher degree of risk of default.

No definition available.

Name:	pnc_StandbyLettersOfCreditBelowPass
Namespace Prefix:	pnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant