v3.26.3
Debt and Credit Facilities (Narrative) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Nov. 30, 2026
Feb. 28, 2026
Dec. 31, 2025
Long-term debt excluding current maturities $ 3,924.5       $ 3,922.1
Short-term borrowings and current maturities of long-term debt 293.1       693.0
Repayments of Long-term Debt 400.0 $ 157.3      
Debt Instrument, Fair Value Disclosure 3,900.0       4,600.0
Commercial Paper [Member]          
Short-term borrowings and current maturities of long-term debt 0.0        
Debentures With Put Feature [Member]          
Short-term borrowings and current maturities of long-term debt 293.1       293.1
Debentures with put option available to be exercised       $ 37.2  
Debentures With Put Feature [Member] | Subsequent Event          
Debentures with put option available to be exercised     $ 256.0    
Three Point Eight Percent Senior Notes Due Two Thousand Twenty Nine [Member]          
Long-term debt excluding current maturities $ 748.3       $ 747.8
Debt Instrument, Interest Rate, Stated Percentage 3.80%       3.80%
Four Point Five Percent Senior Notes Due Two Thousand Forty Nine [Member]          
Long-term debt excluding current maturities $ 346.6       $ 346.5
Debt Instrument, Interest Rate, Stated Percentage 4.50%       4.50%
5.75% Senior notes due 2043 [Member]          
Long-term debt excluding current maturities $ 496.1       $ 495.9
Debt Instrument, Interest Rate, Stated Percentage 5.75%       5.75%
Four Point Six Five Percent Senior Notes due Twenty Forty Four [Member]          
Long-term debt excluding current maturities $ 297.0       $ 296.9
Debt Instrument, Interest Rate, Stated Percentage 4.65%       4.65%
Commercial Paper [Member]          
Line of credit facility, amount outstanding $ 2,500.0        
Revolving Credit Facility [Member]          
Line of Credit Facility, Remaining Borrowing Capacity 2,500.0       $ 2,000.0
2030 Revolving Credit Facility          
Line of credit facility, amount outstanding 1,000.0        
2031 Revolving Credit Facility          
Line of credit facility, amount outstanding $ 1,500.0