v3.26.1
Debt (Schedule of Short-Term and Long-Term Debt) (Details) - USD ($)
$ in Millions
1 Months Ended
Sep. 30, 2013
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]      
Long-term debt   $ 3,424.2 $ 3,422.3
Forward starting interest rate swap agreement fixed rate 4.73%    
$500.0 million fixed rate notes due June 2028, stated rate of 3.75%      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 500.0  
Stated percentage   3.75%  
Long-term debt   $ 499.2 498.9
$750.0 million fixed rate notes due March 2030, stated rate of 4.40%      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 750.0  
Stated percentage   4.40%  
Long-term debt   $ 743.0 742.1
$750.0 million fixed rate notes due March 2032, stated rate of 2.65%      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 750.0  
Stated percentage   2.65%  
Long-term debt   $ 745.0 744.6
$750.0 million fixed rate notes due September 2043, stated rate of 5.30%      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 750.0  
Stated percentage   5.30%  
Long-term debt   $ 744.7 744.6
$700.0 million fixed rate notes due June 2048, stated rate of 4.15%      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 700.0  
Stated percentage   4.15%  
Long-term debt   $ 692.3 $ 692.1