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Borrowed Funds (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
Total borrowed funds | $ 37,195,000 | $ 60,263,000
PNC Capital Trust C |  |
Debt Instrument [Line Items] |  |
Carrrying value - junior subordinated debt | 205,000 |
Trust preferred securities | 200,000 |
Parent Company |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 10,583,000 | 9,825,000
Bank |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 23,591,000 | 41,660,000
Senior Notes | Parent Company |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 9,573,000 | 8,843,000
Basis adjustments - Fair value accounting hedges | 654,000 |
Senior Notes | Bank |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 14,698,000 | 20,167,000
Basis adjustments - Fair value accounting hedges | 485,000 |
Subordinated Debt | Parent Company |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 805,000 | 777,000
Basis adjustments - Fair value accounting hedges | 57,000 |
Subordinated Debt | Bank |  |
Debt Instrument [Line Items] |  |
Total borrowed funds | 5,393,000 | $ 5,152,000
Basis adjustments - Fair value accounting hedges | $ 414,000 |
3-month LIBOR | PNC Capital Trust C |  |
Debt Instrument [Line Items] |  |
Basis Spread on LIBOR Rate - trust preferred securities | 0.57% |

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