XML 151 R137.htm IDEA: XBRL DOCUMENT v3.25.4
RETIREMENT PLANS - Schedule of Fair Value of Pension Plan Assets by Asset Category (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 195 $ 184 $ 178
Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 8  
F.N.B. Corporation      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Other large-cap U.S. financial services companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3  
Other large-cap U.S. companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 60 58  
Other equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
U.S. small-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
U.S. mid-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 6  
Non-U.S. equities growth fund      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 15  
U.S. large-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6    
U.S. mid-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 12  
U.S. small-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 4  
U.S. Treasury bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 18  
U.S. government agencies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 18 26  
U.S. investment-grade fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 25 22  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 177 158  
Level 1 | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 8  
Level 1 | F.N.B. Corporation      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Level 1 | Other large-cap U.S. financial services companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3  
Level 1 | Other large-cap U.S. companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 60 58  
Level 1 | Other equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Level 1 | U.S. small-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
Level 1 | U.S. mid-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 6  
Level 1 | Non-U.S. equities growth fund      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 15  
Level 1 | U.S. large-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6    
Level 1 | U.S. mid-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 12  
Level 1 | U.S. small-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
Level 1 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 4  
Level 1 | U.S. Treasury bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 18  
Level 1 | U.S. government agencies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 1 | U.S. investment-grade fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 25 22  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 18 26  
Level 2 | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | F.N.B. Corporation      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | Other large-cap U.S. financial services companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | Other large-cap U.S. companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | Other equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. small-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. mid-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | Non-U.S. equities growth fund      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. large-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Level 2 | U.S. mid-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. small-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. Treasury bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 2 | U.S. government agencies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 18 26  
Level 2 | U.S. investment-grade fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | F.N.B. Corporation      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Other large-cap U.S. financial services companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Other large-cap U.S. companies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Other equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. small-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. mid-cap equity index funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Non-U.S. equities growth fund      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. large-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Level 3 | U.S. mid-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. small-cap      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. Treasury bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. government agencies      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Level 3 | U.S. investment-grade fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0