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Employee Benefit Plans (Pension Plan Assets Fair Value Hierarchy) (Details) - PNC Pension Plan - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 5,506 | $ 5,615
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 1,078 | 1,342
Level 1 | Interest-bearing cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 56 | 46
Level 1 | Money market funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 220 | 186
Level 1 | U.S. government and agency securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 391 | 394
Level 1 | Common stock |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 410 | 716
Level 1 | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 1 |
Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 1,173 | 1,086
Level 2 | U.S. government and agency securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 302 | 145
Level 2 | Corporate debt |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 684 | 749
Level 2 | Mutual funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 147 | 160
Level 2 | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 40 | 32
Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 1 | 2
Level 3 | Corporate debt |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 1 | 2
Level 3 | Common stock |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  |
Fair Value, Inputs, Level 1, 2 and 3 | Interest-bearing cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 56 | 46
Fair Value, Inputs, Level 1, 2 and 3 | Money market funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 220 | 186
Fair Value, Inputs, Level 1, 2 and 3 | U.S. government and agency securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 693 | 539
Fair Value, Inputs, Level 1, 2 and 3 | Corporate debt |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 685 | 751
Fair Value, Inputs, Level 1, 2 and 3 | Common stock |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 410 | 716
Fair Value, Inputs, Level 1, 2 and 3 | Mutual funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 147 | 160
Fair Value, Inputs, Level 1, 2 and 3 | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 41 | 32
Fair Value Measured at Net Asset Value Per Share |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 3,254 | $ 3,185

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