v3.25.4
Employee Benefits - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
trust
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Total cost for retirement plans $ 155.0 $ 159.0 $ 170.0
Defined contribution plan cost 117.0 126.0 120.0
Pension trust assets $ 1,447.0 1,395.0  
U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Number of pension trust accounts | trust 1    
Pension trust assets $ 1,165.0 $ 1,130.0  
Stock purchased by US plan under defined contribution plan (in shares) | shares 104,317 81,400  
Stock sold by US plan under defined contribution plan (in shares) | shares 179,394 159,810  
Stock held by the US plan under defined contribution plan (in shares) | shares 1,000,000.0 1,100,000  
Market value of stock held by the US plan under defined contribution plan $ 535.0 $ 547.0  
S&P Global Inc. dividends received $ 4.3 4.4  
U.S. | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations (as a percent) 91.00%    
U.S. | Domestic Equities      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations (as a percent) 4.00%    
U.S. | International Equities      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations (as a percent) 3.00%    
U.S. | Cash and short-term investments      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations (as a percent) 2.00%    
United Kingdom      
Defined Benefit Plan Disclosure [Line Items]      
Number of pension trust accounts | trust 1    
Pension trust assets $ 282.0 265.0  
United Kingdom | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Target plan asset allocations (as a percent) 100.00%    
Retirement Plans      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost (benefit) $ (18.0) (18.0) 4.0
Expected required employer contribution $ 11.0    
Number of pension trust accounts | trust 2    
Pension trust assets $ 1,447.0 1,395.0 1,473.0
Retirement Plans | United Kingdom      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost (benefit) 6.0 3.0 4.0
Postretirement Plans      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost (benefit) (3.0) (3.0) (3.0)
Expected required employer contribution 2.0    
Pension trust assets $ 0.0 $ 1.0 $ 1.0