| Submission | Aug. 30, 2024 |
| Submission [Line Items] | |
| Central Index Key | 0000037808 |
| Registrant Name | FNB CORP/PA/ |
| Form Type | S-3 |
| Submission Type | S-3ASR |
| Fee Exhibit Type | EX-FILING FEES |
| Offerings | Aug. 30, 2024 USD ($) shares |
| Offering: 1 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Equity |
| Security Class Title | Common stock, $0.01 par value |
| Fee Rate | 0.01476% |
| Offering Note | (1) Omitted pursuant to Form S-3 |
| Offering: 2 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Equity |
| Security Class Title | Preferred stock, $0.01 par value |
| Fee Rate | 0.01476% |
| Offering Note | (2) Omitted pursuant to Form S-3 |
| Offering: 3 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Debt |
| Security Class Title | Debt securities |
| Fee Rate | 0.01476% |
| Offering Note | (3) Omitted pursuant to Form S-3 |
| Offering: 4 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Equity |
| Security Class Title | Depositary shares |
| Fee Rate | 0.01476% |
| Offering Note | (4) Omitted pursuant to Form S-3 (8) Each depositary share will be issued under a deposit agreement, will represent an interest in a fractional share or multiple shares of preferred stock and will be evidenced by a depositary receipt. |
| Offering: 5 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Other |
| Security Class Title | Warrants |
| Fee Rate | 0.01476% |
| Offering Note | (5) Omitted pursuant to Form S-3 (9) Includes warrants to purchase common stock, warrants to purchase preferred stock, warrants to purchase depositary shares and warrants to purchase debt securities. |
| Offering: 6 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Other |
| Security Class Title | Purchase Contracts |
| Fee Rate | 0.01476% |
| Offering Note | (6) Omitted pursuant to Form S-3 |
| Offering: 7 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Other |
| Security Class Title | Units |
| Fee Rate | 0.01476% |
| Offering Note | (7) Omitted pursuant to Form S-3 (10) Any securities registered hereunder may be sold as units with other securities registered hereunder. Each unit will be issued under a unit agreement and will represent an interest in two or more securities, which may or may not be separable from one another. |
| Offering: 8 | |
| Offering: | |
| Fee Previously Paid | false |
| Other Rule | true |
| Security Type | Equity |
| Security Class Title | Common stock, $0.01 par value |
| Amount Registered | shares | 947 |
| Proposed Maximum Offering Price per Unit | 14.75 |
| Maximum Aggregate Offering Price | $ 13,968.25 |
| Fee Rate | 0.01476% |
| Amount of Registration Fee | $ 2.07 |
| Offering Note | (11) Represents 947 shares of common stock that are issuable upon exercise or settlement of outstanding stock options under the Metro Bancorp, Inc. Amended and Restated 2006 Employee Stock Option and Restricted Stock Plan (the “Employee Plan”), remaining unsold under F.N.B. Corporation’s registration statement on Form S-3 No. 333-256128) S-4 No. 333-207334) |
| Offering: 9 | |
| Offering: | |
| Fee Previously Paid | false |
| Other Rule | true |
| Security Type | Equity |
| Security Class Title | Common stock, $0.01 par value |
| Amount Registered | shares | 46,508 |
| Proposed Maximum Offering Price per Unit | 14.75 |
| Maximum Aggregate Offering Price | $ 685,993 |
| Fee Rate | 0.01476% |
| Amount of Registration Fee | $ 101.25 |
| Offering Note | (12) Represents 46,508 shares of common stock that are issuable upon exercise or settlement of outstanding stock options under the Metro Bancorp, Inc. Amended and Restated 2011 Directors Stock Option and Restricted Stock Plan (the “Director Plan”), remaining unsold under F.N.B. Corporation’s registration statement on Form S-3 No. 333-256128) S-4 No. 333-207334) |
| Fees Summary | Aug. 30, 2024 USD ($) |
| Fees Summary [Line Items] | |
| Total Offering | $ 699,961.25 |
| Previously Paid Amount | 0 |
| Total Fee Amount | 103.32 |
| Total Offset Amount | 0 |
| Net Fee | $ 103.32 |
