Debt and Credit Agreements Schedule of Long-term Debt Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

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

	Effective Interest Rate		December 31,
			2023 1		2022 1
4.200% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.0 and $0.1, respectively)	4.240	%	$	249.9	$	249.7
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.9 and $2.1, respectively)	4.780	%	497.0		496.4
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.6 and $3.8, respectively)	4.920	%	643.6		642.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.7 and $3.3, respectively)	2.512	%	496.0		495.5
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.6 and $3.0, respectively)	5.650	%	293.4		—
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $0.9 and $5.0, respectively)	3.448	%	494.1		493.7
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.6 and $4.6, respectively)	5.480	%	492.8		492.6
Other notes payable and capitalized leases			0.8		0.8
Total long-term debt			3,167.6		2,871.3
Less: current portion			250.1		0.6
Long-term debt, excluding current portion			$	2,917.5	$	2,870.7

1See Note 13 for information on the fair value measurement of our long-term debt.