v3.26.1
Long-Term Debt - Outstanding Long-Term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Long-term debt including current maturities $ 1,500.0 $ 1,500.0
Less: debt issuance costs (3.1) (3.6)
Total Long-term debt 1,449.6 1,461.7
Less: current maturities (131.7) (134.6)
Total long-term debt, net of current maturities $ 1,317.9 1,327.1
5.68% notes, due June 2026    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.68%  
Long-term debt including current maturities $ 0.0 2.9
6.39% notes, due December 2026    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.39%  
Long-term debt including current maturities $ 100.0 100.0
6.44% notes, due December 2027    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.44%  
Long-term debt including current maturities $ 100.0 100.0
6.43% notes, due May 2028    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.43%  
Long-term debt including current maturities $ 1.4 2.1
4.88% notes, due August 2028    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 4.88%  
Long-term debt including current maturities $ 60.0 60.0
3.73% notes, due December 2028    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.73%  
Long-term debt including current maturities $ 6.0 6.0
6.45% notes, due December 2028    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.45%  
Long-term debt including current maturities $ 100.0 100.0
3.88% notes, due May 2029    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.88%  
Long-term debt including current maturities $ 15.0 20.0
5.20% notes, due November 2029    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.20%  
Long-term debt including current maturities $ 100.0 100.0
5.02% notes, due September 2030    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.02%  
Long-term debt including current maturities $ 50.0 50.0
6.62% notes, due December 2030    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.62%  
Long-term debt including current maturities $ 100.0 100.0
5.16% notes, due August 2031    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.16%  
Long-term debt including current maturities $ 90.0 90.0
3.25% notes, due April 2032    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.25%  
Long-term debt including current maturities $ 42.0 45.5
6.71% notes, due December 2033    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.71%  
Long-term debt including current maturities $ 100.0 100.0
2.98% notes, due December 2034    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.98%  
Long-term debt including current maturities $ 63.0 63.0
3.00% notes, due July 2035    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.00%  
Long-term debt including current maturities $ 50.0 50.0
2.96% notes, due August 2035    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.96%  
Long-term debt including current maturities $ 40.0 40.0
2.49% notes, due January 2037    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.49%  
Long-term debt including current maturities $ 50.0 50.0
5.43% notes, due March 2038    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.43%  
Long-term debt including current maturities $ 80.0 80.0
3.48% notes, due May 2038    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.48%  
Long-term debt including current maturities $ 50.0 50.0
3.58% notes, due November 2038    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.58%  
Long-term debt including current maturities $ 50.0 50.0
6.73% notes, due December 2038    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 6.73%  
Long-term debt including current maturities $ 50.0 50.0
3.98% notes, due August 2039    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.98%  
Long-term debt including current maturities $ 100.0 100.0
2.95% notes, due March 2042    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.95%  
Long-term debt including current maturities $ 50.0 50.0
2.46% note, due September 2031    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.46%  
Long-term debt including current maturities $ 5.3 $ 5.8