Debt and Credit Arrangements (Tables)

9 Months Ended

Sep. 30, 2024

Debt Disclosure [Abstract]

Summary of Carrying Amounts and Fair Values of Long-term Debt

A summary of the carrying amounts of our long-term debt is listed below.

	Effective Interest Rate	September 30, 2024		December 31, 2023
4.200% Senior Notes due 2024	4.240%	$	—	$	249.9
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.7 and $1.8, respectively)	4.780%	497.5		497.0
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.3 and $3.4, respectively)	4.920%	644.3		643.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.5 and $3.0, respectively)	2.512%	496.5		496.0
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.4 and $2.8, respectively)	5.650%	293.8		293.4
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $1.0 and $4.7, respectively)	3.448%	494.3		494.1
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.5 and $4.5, respectively)	5.480%	493.0		492.8
Other notes payable and finance leases		0.4		0.8
Total long-term debt		2,919.8		3,167.6
Less: current portion		0.1		250.1
Long-term debt, excluding current portion		$	2,919.7	$	2,917.5