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Pension and Other Benefit Programs (Summary of Fair Value Of Assets Plan) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net $ 395.4 $ 378.5  
Investments measured at net asset value per share as a practical expedient 3.2 3.4  
Net assets 398.6 381.9 $ 413.4
Collective trust funds - bonds      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 357.6 342.3  
Collective trust funds - equities      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 33.2 32.0  
Cash equivalents, other short-term investments, receivables and payables [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 4.6 4.2  
Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net (0.5) (0.5)  
Level 1 [Member] | Collective trust funds - bonds      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 0.0 0.0  
Level 1 [Member] | Collective trust funds - equities      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 0.0 0.0  
Level 1 [Member] | Cash equivalents, other short-term investments, receivables and payables [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net (0.5) (0.5)  
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 395.9 379.0  
Level 2 [Member] | Collective trust funds - bonds      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 357.6 342.3  
Level 2 [Member] | Collective trust funds - equities      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net 33.2 32.0  
Level 2 [Member] | Cash equivalents, other short-term investments, receivables and payables [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Cash equivalents, other short-term investments, receivables and payables, net $ 5.1 $ 4.7