Debt and Credit Arrangements (Tables)

3 Months Ended

Mar. 31, 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	March 31, 2024		December 31, 2023
4.200% Senior Notes due 2024	4.240%	$	250.0	$	249.9
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.9 and $2.0, respectively)	4.780%	497.1		497.0
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.5 and $3.7, respectively)	4.920%	643.8		643.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.6 and $3.2, respectively)	2.512%	496.2		496.0
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.6 and $2.9, respectively)	5.650%	293.5		293.4
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $1.0 and $4.9, respectively)	3.448%	494.1		494.1
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.5 and $4.6, respectively)	5.480%	492.9		492.8
Other notes payable and finance leases		1.0		0.8
Total long-term debt		3,168.6		3,167.6
Less: current portion		250.2		250.1
Long-term debt, excluding current portion		$	2,918.4	$	2,917.5