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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The principal components of long-term debt are as follows (in millions):
March 31, 2025December 31, 2024
3.3%, Senior Notes due 2027
$400.0 $400.0 
3.7%, Senior Notes due 2032
800.0 800.0 
Less unamortized discounts and debt issuance costs(8.3)(8.8)
Long-term debt less unamortized discounts and debt issuance costs1,191.7 1,191.2 
Finance leases and other debt10.2 10.4 
Less current maturities(1.2)(1.2)
Long-term debt$1,200.7 $1,200.4